I've been on the fence on this one vs AquaController III.
I do love the expandability, and that's the selling point - I'm turned off with all the bugs, even though it seems many of them are fixed. Though I'm the type of tinker around with things, tinkering with a controller is a no no for me... Since I will be relying this thing to control *almost* everything - it can't fail. It needs to be set it and forget it. That's the point of a controller no? You'll never know what will go wrong next.
Also, apparently it needs an additional module to connect to the internet (another $150) - and that won't arrive till Dec (at the earliest, and whether it's bug free remains to be seen).
I've never first hand used either (which is a flaw), but I've been reading reviews all over RC.