Let me start by saying these speakers sound AMAZING! BUT they are the WORST if you regularly use more than one, or when you update them. Also, be prepared to return them at least once, the quality control at UE must be pretty terrible. I'm on number 5, yes, FIVE<<----!!!
Having to return a faulty item every once in a while is a fact of life, but having to go through 5 of these is unacceptable. The first time I returned the device then went to Best Buy and bought another one. The second time I had an issue, I addressed it with UE directly. That is a HUGE mistake. UE took almost 6 months of my life that I will never get back.
After writing multiple emails, then formal letters through U.S. mail, UE determined my speakers were non-fixable and had me ship them to their warehouse to be replaced. I have my new set, and I'm terrified whenever I see an update for them.
If you've read this far, you're probably wondering why I'm on my 5th set. The batteries in these units are not very good quality. My very first Megaboom was exciting! I turned it on, played my first bit of music and was blown away by the quality of the sound. Then, the battery died. No problem, right? Wrong! The device didn't charge!! I don't know if it was a faulty USB connection, or a faulty battery. I replaced the cable first, but then determined it was the device.
Fast forward to my second replacement, I bought an extra one to make a stereo pair. They worked very well together, albeit with lots of crackling if you play them around any other type of electronic device or anything with lots of metal (different issue that I've learned to live with). I got an update, so I updated both speakers. After updating, NEITHER speaker would connect to my phone!
I did a factory reset of both speakers, repaired them multiple times, and I could never get them to connect to one another, nor my phone. This is where the 6 months of back and forth with UE came into play. After multiple support emails, phone calls, and a very nasty letter sent to Logitech (parent company of UE) I finally got authorization to send them back to be looked at. They had the speakers for a month. A MONTH! The techs at Logitech couldn't figure out the problem either, so they shipped two new speakers to me.
My most recent problem with the speakers is that they will not update at all. I attempted three times to update one of them, and it wouldn't take. It kept telling me to plug into my computer and update manually. I don't have a PC, so I can't do that. Now I'm afraid to update them, so I'm going to keep the speakers running on outdated firmware. To back-track to UE's quality control, one of my speakers doesn't keep a charge. I have to charge it roughly three times longer than the other one, and I only use them together. I don't have enough patience to deal with UE, so I deal with it. (At least this one actually charges).
So if you want to buy a Megaboom, don't attempt to update the firmware or you'll have a headache. Also, make sure you keep an eye on the performance of the batteries.