Update: I didn't use it last grow. I am growing a short plant, decided to try it again, but with an aquarium pump. Once the plant hit the reservoir, the plant took off like a rocket.
Best growth rate I've seen in my tent.
I still think it's too expensive for what you get. But now that I'm using a bubbler with it, I am happy with it. I'll need to grow short plants, but since I like indicas, that shouldn't be too much of a problem.