I'm sorry, but I have to disagree.
I too have a Roadster 2.
1) The sound quality over FM is very good. There seems to be a certain set of frequencies that the unit itself picks with its dedicated function, and those are usually free of interference from the existing stations.
Well, that hasn't been my experience. May be related to the fact I'm using it in a full-size truck rather than a sedan.
Hey, Dodge DeBoulet, you need to increase the Bluetooth volume on your phone to maximum, not your car stereo volume, to get good sound.
Umm, yeah. I tried every combination of volume control on the phone, on the Roadster 2 itself, and on the radio. Volume wasn't the issue; it was interference no matter what frequency was selected, static, and overall poor fidelity
2) The motion sensing (really sound sensing, if you want to be accurate) is very good on my unit. It turns on when I open the car door without fail. It seems to turn off when the BT signal is out of range. In other words, it works perfectly.
I never really looked into the technology used to turn it off/on without hitting the switch, but I do know that it was too undependable for me. Part of the problem may have been that in my usual parking locations, I would often find that my phone was still connected to the Roadster 2 even when I was inside my home (or camp). I'd go to answer the phone and discover that, even though I was in my office, the other end of the conversation was happening inside my truck.
It works OK for hands-free calls, as long as I don't have the windows open or the heat/AC cranked up high. I've given up on getting it to work with the radio, though.
Dodge DeBoulet, you probably have a defective unit. You need to exchange it.
Well, I've had it for almost 2 years. I don't think it's under warranty any more. That said, I'll probably replace it shortly with an Audi A6 or BMW 535i. I understand both of those devices are great for hands-free smartphone use