i got the garmin c340 about two weeks ago. I'm a brand new driver, so I probably don't like anything to do with driving, so the following is probably a biased review :-P
- the map is a bit out dated/inaccurate. i tried driving to Target, but after following the directions, there was not a Target anywhere in sight. Maybe they demolished it
The shell gas station is listed as a super pump gas station...i guess that's minor though.
- most of the time it announces the turns too suddenly. If i was more familiar in the area, perhaps it would be ample time for me to lane change and turn, but since i'm a newbie in the area and with driving, it feels like i'm making sudden lane changes and turns.
- i've noticed that it works best for me when i first look up the directions on google/yahoo map, and make myself very familiar with them. Then the garmin pretty much serves as a reminder to turn right or left on whatever street.
- one thing i really like about it is that you can sample the directions before you begin driving. For instance, once you choose your destination, with a little button pressing you can read the directions in advance. That way you've got an idea of where you're going.
So all in all, i do like the c340...although it feels like a much older model...again, once i'm more familiar with this area and am less nervous about driving, perhaps i'd like it much more than I do now.