I have listened to one at work (not really sure which version), $120 is probably what one of these is worth. Still, I don't think it sounded very good. If you just want something that gets loud and overemphasizes bass then these are great. Sadly, many people regard this as "good sound." Even more puzzling to me is that many people will use these types of docking systems as a stationary stereo system when they could just as well be using real speakers for the same price or less than some of these "premium" docks.
In any case, I have found that beats products that I have used (docks, the beats pill, and various editions of their headphones) rely more on their obnoxious looks and "cool factor" than anything. These products usually sound disappointing, or as good as something that can be had for 1/3 the price. The puzzling thing is that when try I help a customer at work who is looking to spend $300+ on a pair of beats, they are rarely even willing to look at something we carry in the same price range from Sennheiser, AKG, Audio-Technica, etc. it's a tragedy, really.
desktop + headphone Sonus faber Toy monitor|REL T Zero|Sony UDA-1|Sony MDR-Z7|Sony MDR-1000X|Audioquest NightHawk|Ultimate Ears Triple.fi 10|Sony NW-A35
ht Sony A1E 65" OLED|Monitor Audio Silver RX6, RX Centre, RX1|SVS SB-2000|Sony STR-ZA5000ES|Sony UBP-X1000ES|Sonos Connect + Peachtree Audio DAC•iT|Panamax M-5100PM
stereo Sonus faber Toy tower|REL S/5|Teac UD-501|Sony TA-A1ES|Sony SCD-777ES|Sony ST-SA50ES|Sony 43" X800D|Sony UBP-X800|Sonos Connect|Furman Elite-15 PFi