Reply to "SONY GPS FEEDBACK???"

I went with a TomTom and maybe these pros/cons will give you something to check out on the Sony to see if it will give you similar or better mileage...
Good Stuff - TomTom has a feature called 'MapShare' where users can enter information about map errors (e.g. incorrect street names, one way streets, missing streets etc.), and these updates are then available for other users to download - it isn't perfectly implemented, but it's pretty good overall.
Not So Good - Support (a significant problem in my opinion) ... they release updates that aren't fully tested, so you run the risk of loosing features and then having to either backlevel your device, or tolerate the loss until they fix it - and fixes are few and far between (e.g. they put out a new version last year that accidentally disabled transmitting spoken directions over FM, it still hasn't been fixed, they just keep saying it will be 'soon')

My recommendation is to sniff out the Sony support forum and see what people are saying.
Good Luck!