Rating: 
Recently I went down to a local electronics store and tested a bunch of GPS devices out. The Nuvi 650 gps had the most user-friendly menu featuring three choices: Where to? Show map, and Other.
To go to a location, you select the “Where to” selection followed by an address, store type, favorites, etc. Simply type in a few letters and the unit matches addresses, store names etc. based on only a few entries.
If my computer illiterate wife can easily use the machine to enter an address (she never could figure out my Garmin GPS V worked) then I believe it is a good choice for most people. Plus the screen size is one of the largest in the market.
Also if you are looking around, Amazon had the lowest complete price (price + shipping) of all the vendors I checked online for the garmin nuvi 650 shopping, so good luck if you are shopping there