I have a Garmin Edge 20 and it covers all the things I wanted: GPS, speed, time, etc. You can even use it to follow routes (a feature I haven't tried myself yet). In retrospective I should have gotten the 25 model because with that one you can upload your workouts from your phone (I have to connect mine to my laptop via USB). I got the most affordable model because I didn't know if I'd really use it, since I mainly track my rides with my phone. The display numbers are large enough I can peek at them while riding.

My SO doesn't have much luck with technology, he doesn't get how to get the tracking apps started, so I'll be getting him a regular ol' cycling computer so he can track his miles and speed, which is just what he wants (no need for GPS or uploading rides).