Just addiding my 2cents here. I have been using a Garmin 60csx for about a year now and I have been very happy with it. Yesterday I purchased a BB Curve (8310, at&t) and I immediately loaded Trimble's Geocache Navigator on it. I am VERY impressed. I drove to a near by town today and had 100 % success. The BB put me within just a few feet every time. Great package, I highly recommend it!