Works well so far. Have it on a 55 gallon drum at our camp out in the woods. It is all plastic, and feels it, but so far I've not had any issues. It fit the bung hole (2") fine, and is very tight/sturdy in place. The extension on the end is nice, no pretty, but it's good to extend when needed into a bucket. Overall, I'm happy with this pump, it was exactly what I was looking for.
There is a little strainer in the extension arm, and the arm is setup to give some adjustment/error if your drum isn't an exact height.
The five stars is taking the price into account.