Nuvi 3590

Pros
+ Screen is very easy to see, even in bright daylight
+ Thin for a 5" unit
+ No issues with polarized sun-glasses
+ Snappy user interface; every touch is immediately registered
+ Drag gestures work on most screens
+ Intuitive design, easy to use
+ Removable window mount has a built-in speaker
+ Very fast acquisition of GPS satellites
+ Very fast routing and rerouting

Cons
- Pricey
- The 5" screen makes this too big to fit in your pocket or carry around
- Windshield mount falls on occasion