Hmmm... used Cateyes almost exclusively. The contacts do need cleaning off with a pocket knife blade from time to time if you ride in the rain. But all bike computers seem to be like that.

I have used the lower end ones with the usual plus average speed, but not maximum speed. Up to now, the models have had only one button, on the trailing edge, plus the reset button on the back. I lost my favourite one on a recent randonnee, so that bike now has a replacement Enduro 2 with dual trip logs, but two buttons (still on the trailing edge).

I refer to buttons because a jeweller friend of mine, in discussing watches, said the more holes there are in an electronic device, the more chance of water getting in and causing problems.

Of course, there are some who tour without any computer at all -- citing the ride and enjoyment as being more important than numbers. Also eliminates another source of frustration.