A word about the seller, Omnikeys. I purchased this unit because it was the lowest priced version. I didn't realize at the time that I was ordering from South Korea. When I realized what I had done, I began to fret, worrying about gray market goods and so forth. My fears were unfounded.
Having listened to (and purchased) several brands of high end bluetooth speakers, I can confidently say that the UE Boom is the best of the genre; Construction and attention to detail are rock-solid; The units are aesthetically pleasing and the sound quality is quite satisfactory.
With all its pros; it still feels pretty ridiculous to drop $200 on a bluetooth speaker; let alone $400 to have a stereo pair