I am not using one, yet. One the surface, it sounds like it is a simpler design (less to cause problems) and can continuously dose. Price difference is minimal, and honestly I suspect that the original will be discontinued. Unless I am mistaken, EoTech and Neptune are under the same roof - so they have plenty of experience to draw on.
As I said, I am not using one yet, I am not dosing yet. But I am putting a system together and will be integrating one into it - easier to design the control board from the begging and work out wiring before it is all under the tank and I want to dose in 3-6 months. Perhaps 6 months down the road I will not see the need to dose, but the odds are pretty good I will get the same chasing parameter disease everyone else seems to get and one point or another.
My biggest worry is the current threads in the controller forum. Lots of Apex headaches. But, that said, I will be setting this up on an empty tank first - so hopefully either they will work out the problems before I add water, or if they system crashes no coral or fish will be threatened. Planning on months of monitoring anyway before any dosing starts.
