I bought these headphones exclusively for mountain biking, the flat wire allowed me to route them through the inside of my bike helmet comfortably. They are lightweight and fit securely in the ears. So far the ear buds have hold in place to the bouncing and active use. The signal is constant, the sound is good and noise cancellation is good too. These have a very nice, soft and durable rubber finish which is forgiving to dirt, dust, as well as moisture. I find very easy to wipe them clean after every use. The downside of these is the battery life. These are advertised to offer up to 14-1/2 hours of listening time when fully charged however, somehow they never last me more than 4 hours of continuous use. I do not bike all day so it does not bother me that much but still feel mislead. If you are looking for a rugged, durable and comfortable headset these may be for you however, make sure to get the charging case too because you will need it. If you need a Bluetooth headphone that rock all day then get the LG - Tone+ Bluetooth Headset, those suckers don’t die.

I've since seen them on sale for much less but I'm not angry. Battery Life is as advertised. I really like to supplemental charger / carry case. Sound is good overall but like most in ear head phones there is thumping during exercise, but I probably do have a harsh stride. No excess thumping on an elliptical. When I purchased - I did not understand how these things stay in your ears, but I like the method. Not quite as comfortable as my Bose in ear but they do stay in and are gloriously cordless! I've uploaded a picture to help you see how these things stay in your ears. A little tricky to pair to multiple devices. Basically you need to repair each time you switch devices. An extra step for sure but easy to manage from the head phones just start with the head phones off and hold down power button until they enter pairing mode.

Fast connection (Nexus 5 Phone), Sounds are crystal clear, bass is clean and high, but not as much bass as previous generation. Bought this to replace my first gen back beat Go's, as they had, after 2 years of heavy abuse, finally stopped working properly, only one ear piece only works now. These Back Beat Go 2's are big step up on volume, much louder then pervious gen, and sound is really clean. The first gen had much more bass, in my opinion, but the volume on these make up for it and it still has great bass. My job requires air plugs, and these act the exact same for me as the ear plugs, blocking sounds that are harmful, such as plane engine noises. This is a great plus since I can use it for both that, and listening to music, or answering calls. The sweat proof coating helps with not sliding out of ears when I sweat, 1st gen used to occasionally slide out, losing ear protection and sound quality when I was sweaty. Don't bother with the ear tips that are already on, just go straight for the smaller ones inside the box, it was the same with 1st gen, and the same with these. Only then you can appreciate and hear the nice bass and clean sound. The only reason not to give this a 5 star rating, would be battery life. While for my needs its great, the competitions battery life blows these out the water. But I'd choose these over any other, any day, the small form factor is much better, they're literally just like small ear plugs. Battery lasts 4.5 hours of continuous use, however they last me a full 8 hour work day listening to music on and off, and a TV show here and there. I do however turn them off, for every time I take them out of my ears, which I believe helps make them last long. The good news is, the case it comes with, acts as an extra battery charger. If you do drain the battery, you just have to plug it into the case and you will get a full charge within 20 mins. You can do this twice with the case, so you could actually get a good 14 hours of play with these headsets if you use the case for a brief 15-20 mins. I do wish the case itself was a little better in fully protecting them, but it does the job decently. One complaint I have, is each one may come with an AC adapter or not, some boxes come with it and some come with a USB adapter instead. The USB apdater can be plugged into a computer and has an additional USB port, in order to still be able to use USB with something else while charging. Every package should actually just have an AC adapter instead, but that's what Plantronics chose to do in some boxes. These adapters aren't to be confused with the single USB cable that comes in the box, you are supposed to get the adapter along with the cable. Which leads me up to another complaint, my box didn't have either adapter, and was missing. I didn't bother take it back as there was only 2 left, and there where brought from "the back" of the store, plus I have my ac cable from the 1 gen. So make sure you're getting everything in your box if you decide to purchase one of these bad boys. You will know which one you're supposed to get, as there's a picture underneath the instruction manuals of which you should have, AC adapter or USB adapter, plus cable. The range is also good, I can walk away from my phone almost a good 60ft and still be connected. Controls are simple, Power button, vol up and vol down. Power button Acts as pause and play for music, also use to answer and hang up calls. One slight long press will launch Google now, and a double tap will do a redial. Holding a vol button will skip forward or backwards (+ or -) to next track or previous track, or replay current song. There's also voice alerts, unlike previous gen which was just different beeps, these ones have a woman's voice, notifying you of battery strength and when connected or not. Also vol up and down. Hoping these will last me a good 2 years, just like the 1st gen lasted me.

I bought these to replace my Jaybird Freedoms which I loved. At first the fitment was bad but then I swapped out the buds for bigger ones and now they stay in better. They still fall out, but they're more comfortable. The ear thingies don't work as well as the jaybirds, but they're more comfortable and less intrusive when they're in. I kinda like these better. The carrying case/charger is awesome. It's gotten me charged in a pinch. Which leads me to the the only con: the battery life. I was used to more than 4 hours. Having only 4 is a little annoying. But you just have to adjust things so it doesn't become too annoying. I like this product. there's probably better out there, but this one is pretty awesome.

Pros: Pairs easily with multiple devices. Ear buds have interchangeable rubber inserts in different sizes for comfort. Easy to use, and easy to charge. Cons: Volume is limited. Bass could be better. Battery does not last long. I purchased the Plantronics BackBeat Go 2 Bluetooth headphones to use at the gym and while running. I have an iPhone 5 with the bottom headphone port and the headphone cables kept getting tangled. The Plantronics headphones paired easily with my phone and with my iPad Air. I can even switch back and forth between them easily. They are relatively light weight and do not shift around while running. The earbuds adjusted easily to fit. Being cord-free is a huge improvement over traditional headphones. Drawbacks are that the sound quality is not as good (due to Bluetooth compression of files?). The charge only lasts about two hours. The maximum volume on the headphones is kind of low, and the bass could hit harder. Otherwise, I'm quite satisfied and they certainly are a good product for the money.