I got my Garmin Edge 305 w/ HR and CAD Monday as a gift from my wonderful wife. I ordered a second speed/cadence sensor for my second road bike. Installation was a breeze...the easiest that I have ever encountered. I have probably read every review on the internet before making my final decision. I did something that I rarely do with a new electronic device and actually read the manual from cover to cover while I waited on it charge. After charging was complete I installed the latest firmware, which was very straightforward. Everything that needed to be setup or configured was easy to understand. Within minutes I had all of my Data Fields setup just the way I wanted them and a pretty good understanding of the unit.
I took my first ride with the Edge this morning. I had no problems pairing my accessories or getting started. This thing is absolutely wonderful!!! I was able to setup one course, my main training loop, and will be using the virtual partner when I ride again on Thursday. I will also be using the "Quick Workout" and "Interval Workouts" on my future rides.
I love being able to see so much data while I am riding. My favorite piece of data is the grade percentage.
I didn't think I would like any other cycle computer better than my Polar CS200 but the Garmin Edge 305 has it beat, hands down!!! After I get one more mount and another cadence/speed sensor, I will be using it on all of my bikes.
BTW...the speed and cadence seem to be dead on.