I did my first ride with a POWERCAL last night. Normally $100, you get a heart rate monitor with a power guesser for $70 from 39th. That's the same as what you'd pay for a regular hrm anyway. So far it's exactly what I expected, its pretty accurate, for slow twitch guys it would be perfect. I'll know more if I ride more.
Mountain bike race coming soon, free food and coffee. Come out and cheer on the racers! Or put your big man pants on and race.