The commercial promises "pumpin' bass and quality sound" from a 1-inch speaker on a key chain.
Set up is simple: It has a built-in, re-chargeable battery, stereo jack on a not-so-long cord that plugs into your music source, and an off and on switch. The jack fits most iPhones, MP3 players, laptops, tablets and desktop computers.
If you're a true audiophile, this is not for you. Remember the objective is to share the music experience with friends. I wouldn't call it "pumpin' bass" big sound, in fact during our test, the sound was actually on the tinny side.
However, if all you're looking for is non-electric, earphone-free, portable tune-sharing, it delivers. Not ingeniously cool, but for the fun factor, I'll give it 3 stars on a scale of 1 to 4.
Keep in mind, the marketing for Boom Cube clearly targets kids and teens and that's pretty much who I expect would find the device appealing. It comes in different colors and can be found at most retailers who carry "As Seen On TV" products.