I used the Garmin nuvi 360 while on a trip in Vegas. Worked very well! I'm used to the Acura & Honda navi products but had no problems adapting to the Garmin. The only thing that was bothersome was having to learn where they put certain things: "Banks" is under "Community" top level rather than being its own top level category.

GPS Magazine has some extensive reviews here. If you can, wait a few months as there are a whole slew of new navis coming to market from Garmin, Magellan and TomTom.