Eugene, Oregon-based bicycle advocate and customer Shane Rhodes, a.k.a. The Bike Phantom, recommends it and says the volume is big enough for a small cluster of riders to hear the music. With a 3" speaker, the Cycler isn't going to deliver satisfying bass hits. It's a basic law of speaker design that the smaller the speaker and its enclosure, the harder it is to get good bass response.
But how important is bass response on a bicycle? I think it's essential, and Rock the Bike is obviously committed to the path of building bicycle music systems with cabinets large enough to deliver satisfying bass. With good bass, you and the people around you feel 'in the music'. Without good bass, you can sing along with your friends to your favorite songs, which is a wonderful experience. But it's a different experience than cruising in the music, which feels a bit like being in your own music video. Plenty of people disagree with me on the importance of bass response.
Others are more hardcore than I am: