I've had an Aquatronica for a little more than 2 years now...
Love it. No major electrical, or electronic issues; except when I doused a pH module with saltwater, and shockingly, it stopped working. :eek2:
I do like the expandability, the company's desire to build what the users are asking for, and that they're somewhat receptive to allowing outside programming.
Overall; I rate it a 7.5 out of 10; I think the Elos controller is the end-all be-all, but it's also significantly more.
I'd buy it again....
-Andy