Garmin GPSMAP 66sr
Hiker's Best Friend
Quality - 5/5 stars
Garmin handheld GPS units are generally built pretty well in that they are water resistant and shock resistant to some extent. Given the price, discussed down below, you should still invest in a good protective case to make absolutely sure your GPS survives those unforeseen accidents.
Usefulness - 5/5 stars
The uses for a GPS seem limited however, when properly equipped with maps (free, open-source maps you absolutely should install on your device) you can do so much more! For instance, when you can't park in the parking lot for your favorite trail so you have to park in the lot for a different trailhead but you know all trails are connected.... you just don't know how.... You can now route yourself via GPS! It will tell you which trails to take as long as you have trail routable maps loaded (see the link above!) which is just awesome. On-road, off-road, or on a trail, you will never not know where you are and how to get where you are going!
Cost - 4/5 stars
I would have dropped this to 3 stars except that, in my case, I found a bundle that got me the GPS unit with a backpack tether which makes me feel slightly better. The unit itself is pretty expensive but, considering its value and what all it can do, it's hard to be mad at the sticker price. It might be painful but it is worth every dollar.
Overall - 5/5 stars
I won't list each and every feature here but that this GPS has a built-in rechargeable battery was the real selling point for me. Too often, with my last GPS unit, I would find that the batteries were dead and I didn't have spares. At least with a rechargeable battery in this unit, as long as I bring my battery packs and a charging cable (which I always do), I will never have a problem with dead batteries (knock on wood). I really can't oversell having a GPS unit on-hand when hiking, camping, or doing any kind of exploring of any kind. There are many types out there so choose what's best for your needs and pick one up! You won't be disappointed!