...I really like it. The buttons are easy to use and it is easy to read. You don't have to remove your hands from the brake hoods to use it. I also like being able to change gears and not strain my neck trying to see if I am in the correct one
. If you are into racing, it might not work well for you. The cadence is a virtual cadence, calculated by the computer using the wheel diameter, speed, and gear ratios. Its accuracy suffers it you change wheels or cassettes and forget to load them into the unit. It is not a true cadence. I have coasted down a hill and it still read a cadence well in excess of 100 RPM. It is also suceptable to RFI (radio frequency interference). I got a kick out of showing my friends how I had a max speed of 390 MPH after riding past an electrical substation. This has only happened on three occasions and alway going past the same substation.
In the case of losing information, if you note your mileage prior to taking the battery out, it will allow you to re-enter that number during the set up procedure.