I've had this 5-piece trigger set for about 14 months, and over that time, three of them stopped working with the drums (snare and two toms). They still trigger when you lightly tap on them on their own, but when you attach them to the drums, they don't do anything.

I'm too lazy to repair them, but if you're only needing a kick and one drum or are even slightly good at soldering or replacing foam and willing to troubleshoot them, you'll be able to have a fully functional set of triggers for 1/3 the cost and an hour of work. I'm selling "as-described" because I don't want anyone acting surprised that they're showing up non-functioning even though I marked it that way and was clear upfront.