I haven't changed my mind in regards of the RK2; however, you’ve got a good point.
Let me give you another scenario that actually occurred to me this past week, I left on vacation and had a friend look after my tanks, on the second day of the vacation there was a large storm and my house had a strong power surge, everything lost power for approx 4 hours, my friend called me that night and told me that the lights of the small tank (RK2 tank) were off and that all the other tanks appeared to be off. I suspected that it was a lost of power situation and instructed him to reset the GFI's on the other tanks and sure enough they turned back on, no major damage, then he went to the tank that had the RK2 and noticed that all the pumps were working but there was no lighting apparently the Clock had reset when the light were out and it need it to be re-program, I was afraid of asking him to touch the controller as he has never seen it nor he is acquainted with computer controls, plus I had not had to touch the controller for months so I did not remember how to reset the time.
I asking anyway to try to input the correct time on the controller with me giving him instructions over the phone, he did it in about 1 minute he had successfully reset the clock on the unit and the light s were back on no problem.
In this case the fact that the unit was user friendly did save the day, as I said at the begining both units are good it is a matter of preference.