+1. I hardly look at the Garmin (Edge 305) during a ride. I used to even have a 2nd computer with numbers big enough for my tired eyes. Now i just use a larger display setting on the Garmin.

As an engineer, I love all the data.

Charging the unit isn't generally a problem, but getting on the bike to discover dead batteries because you've forgotten to charge or that the wire wasn't connected can be quite annoying. I have been meaning to get one of those external USB battery pods for the many cases where I forget to charge.