I had the Garmin 255W (4") and switched last year to the 1450 LMT (5"). Really like this with the larger screen and life-time maps and traffic updates. One thing about the map updates, even with broadband, it takes close to 2 hours to complete the process. I get a notification of new maps several times a year. Traffic updates are typically in the larger cities as it identified a traffic backup on one of my recent trips to Pittsburgh and it was right.
Bought this one from Target on Black Friday last year for 149.99. This is after I waited in line for hours just to get into the store to get one - only to be sold out before I even got close to the counter. Came home, jumped on-line, and bought it for the same sale price. Then went to work.
Overall we are very pleased with the unit and has never led us astray yet.