I posted basically this same comment on DC Rainmaker's blog. I understand why Garmin is doing this, preventing cannibalization, but I think they're overestimating that reality. Sure some people might buy this instead of a 510, but I could see myself getting one of these along with my 510 (if it supported power). I hate the idea of my 510 getting ripped off in a crash during a CX race. Something smaller/cheaper would be perfect for CX/MTB/etc where external damage is more common than Road. Also, for TT I could see this as a great small unit since I doubt many TT riders use much more than speed/time/power/HR during a TT.