I see a fair number of Priority bikes here in Manhattan. I happen to be less than a mile from their headquarters but have never visited. I like the bikes, and I can imagine that the drawbacks are worth tolerating to reap the benefits.

While waiting for a light in traffic, I struck up a conversation with a man on a Priority. We rode together chatting after the light changed. He is extremely happy with his and had previously had a lot of the more normal bikes. He likes his Priority for the reliability, and he doesn't find it heavy or slow. They don't look heavy or slow. I think those bikes make a lot of sense, especially if you want to commute by bike often.