I love my Zumo 550. I used to have a Garmin Nuvi 350 but every once in a while the vibration would cause it to have problems. The beauty of the Zumo is that it's solid state, no moving parts. I have a Chatterbox mounted next to mine with the audio cable from the Zumo going to the Chatterbox. That way I can listen to music and navigation commands as well as talk to fellow riders. I think I will be making a small sun visor for mine as I have had some issues with glare on some trips.