I use the kurt kinetic wireless computer for its wattage calculator. It is only accurate while on the kurt road machine trainer yet all other functions are solid on the road including elevation, gradient, cadence, temp, HOUR etc.
I am not at a level where monitoring my normalized power while racing is important, so my data interpretation is most useful when doing interval workouts on the trainer… And after a month and a half of using watts to gage my intervals v.s. Heart rate (which this unit does too) I have noticed the two biggest improvements in my fitness to date.
Only one complaint, not ANT+ or any other way to upload the data to a computer.
I use a PowerTap SL+ wireless powermeter with a Joule 2 headunit.
It is a test unit from Peaksware, so I favor it! It works seamlessly and Saris gives great support…just had it rebuilt and re-warrantied.
The data is like GOLD! I work with a coach that has me on a power-based training protocol, so the data is direct feedback. TrainingPeaks.com and WKO+ translate it into how fit, fresh and trained I am. Great questions, Arleigh!