I've been running one of these for some time now. Once you get by the little quirks they are good.
First off don't buy the airlifter. They just plain suck. Hook the overflow up to a PH and it will do wonders.
Second I would purchase a float switch. (which I would recommend for any overflow not built into the tank).
That is what I'm running on mine.
With both of these in place I have had no problems. About every 2 months I replace the air tube and clean out the connections. Other than that. works like a charm.