The purpose of this speaker is to have a Bluetooth speaker that will survive drops, falls, spills, being dropped into water, sand at the beach, etc. With that purpose in mind, this is a good speaker. Is the sound quality as good as some other Bluetooth speakers in this price range? No, it's not. But that's not the point.
The sound is decent, albeit heavy on the treble with very little bass. Using the equalizer feature on my phone to add some bass only created distortion. Rock, Country, etc will sound good. Anything that's heavy on bass will be lacking. It can get loud but it starts to distort at higher levels. But again, that's not the point.
When it comes to having a Bluetooth speaker that gives you a worry free experience, this is great. I have taken this outside and dropped it onto concrete from a few feet in the air. I filled up the sink and submerged the speaker, while it was playing music, for a few minutes. Unless you hold it down, it floats. Again, a great thing for people who camp, have a lake house or a boat, or just go to the beach a lot. Dirt doesn't get in and any dirt you get on it can just be washed off by running it under the sink or with a hose. That my friends, is THE POINT of this speaker.
It can take a beating and still come back for more. I have another brand that has much better sound quality, but if I take it into the garage while I'm doing work or outside, I always have to carefully place it and make sure it doesn't fall or get wet. This speaker has good enough sound quality and alleviates all of those concerns with having it outside. Also, with the way it's designed, you can stand it on end or even use the handles on the ends to hang it from a ladder or wherever if you're working and don't have a place to set it.
I gave it 4 stars for decent sound quality, number of ports and options for playing music, ease of Bluetooth connectivity and overall design and ruggedness. I did mark one star off because in my water test, I notice that while the water was mostly kept out of the dry box compartment, there were some drops pretty close to making it in (see pictures). The only concern there is the usb and aux jacks that don't have covers. Honestly you wouldn't be able to put much in the drybox outside of some credit cards, cash, keys, etc. Maybe an ipod shuffle or nano for listening to music, but it is a very small compartment. I'm also not a huge fan of the proprietary charger but I have other's that have the same issue so I can't take a star away. Just be aware of it.
For someone looking for a speaker for in the house or at the office, I wouldn't recommend this. For someone who wants to give this to a young child, or someone who does construction or just works outside a lot, I would highly recommend this. If you are near the water or go to the beach a lot and need a speaker, this is for you. There is a larger version that might have a little more kick to it but I think this is a good travel size. Battery life was a little over 12 hours in my test...oh, and it has 2 USB power out ports so you can charge your phone from the speaker. In a pinch, that could end up being the best feature! So if you're the type who likes stuff to just work out of the box and stand up to your abuse, I recommend.