I have the Maestro 3200, it's a new model that just came out. Got it last week and I like it so far. Takes some funky routes that make you scratch your head if you know of a shortcut but overall it gets you there.
One thing, it doesn't call out the street names like Garmins do, it just says "Turn Right" where the Garmins will say "Turn Right On North Avenue".
Also, something I haven't had time to look into on my new unit, is the ability to update the maps. Some can do it from the car automatically, some need to be plugged into the computer and have maps downloaded and some might not be updatable at all.
I need to read the manual with the 3200 and find out about this.