I bought into the complete Apex universe as I wanted to try the whole controller thing. I bought about $1200 worth. I've sold a portion of it and I'm about to sell the rest for very cheap as I have been using it for about a year and I basically just use it as computer controlled on/off switches. It does work (for some things I've experimented with) but, I feel it's just so cheap feeling like a child's toy and the physical design of everything is just awkward and clunky. I had to build a controller cabinet in a closet just to organize it all.
To me, it's just not worth it as it is just something else to maintain (i.e. Trident, reagents, probes, etc.) that i really don't use or see the benefit, for my situation anyway. And, the added cluster of extra wires just drives me nuts. I can't say I am confident or not, I just don't use it for it's full potential so I have no idea in reliability. Not for my style of reefing I suppose.