The big story here is the amount of sound you get for the money. Typically, $100 Bluetooth speakers tend to be small (the JBL Flip and UE Mini Boom, for example) and thin on the bass. For $100, you'll be hard-pressed to find another Bluetooth speaker that delivers as much bass as the G-Boom, which goes deeper than the and also plays louder.
The one area where the speaker falls short on is clarity. You're just not going to get the more crisp, dynamic sound of higher-end speakers of this size (I'm thinking of something like the). Also, you may experience some distortion at higher volumes with certain tracks. But for $100, it should exceed most people's expectations.
Conclusion The G-Boom is geared to a more youthful audience or anyone who wants a decent wireless speaker for an affordable price. From a design standpoint, it has its pluses and minuses -- some people will dig it and some people will think it's plain ugly.
I vacillated between those two viewpoints, but the more you think of this speaker as one you plan on moving around a lot instead of keeping stationary, the more appealing the design will be, particularly if you intend to bring it outdoors frequently.
I can't tell you how well it will hold up over time baking in the sun throughout the course of a summer, but it seems pretty well built and plays loud, with a good helping of bass. It's not often I make that statement about portable Bluetooth speakers, particularly ones that cost $100.