I just got one a few weeks ago and love it. It sounds great. I submitted a post in this section of the BoogieBoard not too long ago about it.
Here's a clip of a guy playing one on youtube:
http://www.youtube.com/watch?v=hD6mqGMkBC4
No, but doesn't the Roadster have the Lonestar reverb? I guess I'm not sure why you'd need an external reverb with the Roadster. I've never really played one though. But yeah, Mr. Springgy should work fine. I ordered mine direct from Lee Jackson off their website. The pedal got here amazingly fast. I think it was two days. Anyways, hope this helps!