I've been using one for a few months now.
Positives: Std Power Lead. Easy to read Screen. Light weight. Price
Negatives: Not waterproof. More difficult menus. Flashin track gives me the irrates.
You'd have to compare it with a GPS12, or equivalent in Garmin stable which are much more expensive.
Overall, I'm very happy with mine, if I could just figure out how to enter a waypoint from a grid reference.