I use this GPS for both work and personal reasons. I like that it is small, light and easy to carry. It comes with a belt clip, but I don't use it because I'm paranoid about it falling off. It has survived several dunkings and soakings without incident.
This is great for marking points on a map, or marking where you went, and for geocaching. I use it for marking campsite locations, or locations of points of interest, or recording items that I have to report to others (the river I work on is an international border, so recording GPS coordinates of new trails, etc. is very important.) I recommend coming up with a shorthand for each trip (a few initials) to put in for your waypoints, because typing out long words takes time and is a bit awkward. There are only a few buttons, the display is clear, and there are lots of additional mapping products available for the unit if you want more.
The only drawback of this product (why I gave it a B) is the instructions. I didn't find the instructions from Garmin to be very helpful. The labels on the buttons don't really indicate their use, as each button has multiple uses. There are, however, many helpful videos posted by users on YouTube that I found. I kept getting confused and marking waypoints instead of independent data points, but after watching a few videos I figured it out.
I've used more expensive units, but I found them confusing and I wasn't using all the features of the unit. This has all that I need!