I have the eTrex Vista. In two months travelling from the US to Guatemala (currently) it has performed flawlessly. The only slight problem has been that the locations of towns and roads stored in the GPS map can be somewhat inaccurate, at least for Mexico & Guatemala - in the US it was perfectly accurate.
I have the RAM mount and has performed flawlessly, too. The GPS is fed via the Garmin cigarette-lighter adapter plugged into an accessory outlet. This adapter (transformer) has just shorted and is therefore useless. It is not sealed, so if you get one, I suggest running some silicon down the seams. The GPS runs just fine off batteries, though, and I give it the thumbs up.
Altitude readings seem less accurate than the longitude/lattitude positioning; going over the same mountain pass at different times, it gave readings different by 20m.
James.
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James Courtier
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