I actually could not decide between the Garmin Nuvi 255w or the 750 model, so I decided to buy them both for comparison. I mounted 255w and 70, both to my car windshield and gave them various addresses to find together.
Both models took the same routes and announced upcoming turns and street names at practically the same time. As note the 255w was updating my position on the road more often about 3 times as often as garmin 750.
This made for smoother graphics on the Garmin 255w of the vehicle moving along displayed roads, where the 750’s display was more of a “jerky” movement. I found that the 255w display was a bit brighter, clearer, and more vivid than on the 750 in both daylight and at night. On the 255w is the graphic turn indicator in the upper left corner, which the 750 lacks and I like this feature. a small arrow which shows upcoming turns and the distance to that turn. It also show things like a fork in the road, (ie: a Y intersection), and which fork you will be taking. 750 just displays text on the top line for upcoming turns without the arrow. It’s a little extra feature on the garmin 255w which I happened to really like. Garmin Nuvi 255w also automatically adjusts the font size of displayed text so that even lengthy text will fit.
255w feature display the posted speed limit on the road which you are currently on right above your current displayed speed. I found myself not even looking at my car speedometer as I could easily see my current speed and the speed limit of my route at a glance. The 750 doesn’t have this feature. I also like how they moved the zoom in (+) and zoom out (-) buttons on the 255w to the same side of the screen which makes it a bit easier. On the 750 the zoom buttons are on opposite sides of the screen.
There are some features on the Garmin 750 that the Garmin 255w does not have. The 750 able to broadcast it’s sound over your FM radio with the supplied cigarette lighter cable, and it has a headphone jack, which I found to be nice features. The 750 also has an MP3 player and an Audio-book player, which the 255w does not. Another awesome feature of the 750 is the car locater. This is a nice feature if you are parking in a really big lot, such as at an amusement park or a fair. When you remove it from the car 750 will marks your location, then it will bw easy to find where your car parked. The Garmin 255w doesn’t have the car locater feature.
I also thought the 750 voice more pleasant sounding than the 255w. The 750 sounds more like a real female voice, where the 255w sounds more robotic.Another thing to consider was that I paid $50 less for the 750 and it came with the FM transmitter cable and a USB cord to connect it to your computer for updates and downloads.
My decision was the 255w and return the 750 because I really liked the graphic turn indicator and the posted speed limit and current speed indicators. I didn’t find a need for the 750’s MP3 player and Audio book player, but that is up to personal preference. I purchased the USB cable for $10 since it was not included with the garmin 255w. So you should buy Garmin Nuvi 255w.