I was curious as to the mileage I was doing after I had bought a bike and also time taken to get to work, as opposed to using the car.
It was easy to install, about 15mins tops, and worked from the outset. Very useful info can be obtained and I thoroughly recommend this for anyone looking to get information about their cycling performance for a small price.
I was using a much more expensive wireless computer but that let me down - just resetting itself when I went over any severe bumps and no amount of fiddling around seemed to fix it. I got the Mach-3 as a stop-gap but have stuck with it. The figures are large and clear and I can read them without my glasses, the computer has proved itself reliable and it has enough functions for me, all easily accessible from the single button. Reliable, inexpensive - what more do you want?