My first one was a Sigma which just had. Speed, Max. Speed, Distance, Time, Total Time & Odometer (Setable which is a nice feature). It auto starts and stops it's time recording.
My new one is a CatEye Astrale 8. It has both the speed and cadence sensors, has all the same features (except the setable odometer) and also average speed and either an auto start/stop or a manual start/stop.
One thing I noticed while I was setting it up was that the manual for the CatEye computer specified a different circumference for my wheel than the Sigma. Not an extremely large variance but still more than I expected.
The old one is a Sigma Sport BC800
Sigma manual says that a 26 X 2.0 wheel should be 2114 mm
The CatEye says that the same wheel should measure 2055 mm
a difference of 59 mm or 5.9 cm, that's nearly two inches!!
I did a roll test and although it wasn't extremely accurate it appears that the Sigma is closer to the mark than the CatEye.
How do you calibrate your computer, based on the table or do you do a roll test or tape measure around the wheel?
Anyway I did a test ride last night, very short towing the kids to see the geese in a nearby pond. 2 KM round trip and they both measured the same. Also saw that my comfort zone for cadence is generally in around 70 to 80.