I've had one for the last six months on a reef tank, been perfect so far, a few of my mates have got them too with no problems reported. Easy to program, calibrate, they were more expensive when I bought mine but still a total bargain. Fish street's UK warehouse sell a kit for them including a mounting bracket for both the hoses and pump as well as a 3 pot container for the liquid to be dosed (why 3 pots on a 4 head pump?). I'm going to get another for my new planted tank next month after payday. Jebao have also started making a 2 head version as well for £45 + postage