I'm thinking of getting a Garmin Edge 800. I'm interested in geeking over stats so I was going to go for the heart rate/cadence bundle. It will certainly fit on my hardtail fine but I'm not 100% sure that my full suss is shaped right so that you could get the sensor in a place to read both speed and cadence. It just looks like it will be a bit touch and go if it will work.
So first question: Is any one using the cadence and speed sensor on a Five?
Second question: I know that speed can be detected via the GPS alone, but normally that setup would mean there being no sensor at all. I'm worried that the sensor will override the speed detection on the GPS and register as zero because there is no magnet going past the sensor. Anyone using it to just read cadence in this sort of setup?