I've got two of the 8-functions. Not bad. One has a dodgy button, that
needs a firm press. The main complaint is that you can't choose which
function window is open. You press the button and it switches over
(from speed/time to distance/time elapsed), then after a few seconds
switches back to the default. This can be annoying in a race, if you
want to monitor constantly how far you've gone, not how fast you are
going.
Donga