I don't have any direct experience with the system, and I wouldn't worry about reliability, etc. As you said, everything has a manual switch that overrides the tablet if need be. The cool part is that if you have an Android phone, you should be able to add those apps right to your phone and use that to control stuff in addition to the tablet.
My issue with this type of system is what does it really do for you? Is this technology really helpful, or it is it just technology for the sake of technology? Is it easier to get the tablet and open an app to turn a light on or just go over to the switch and give it a flick?
As I said, I'm not concerned about complexity and reliability, but more so what actual benefits does it really provide? I would look at each function that you get with the system and imagine a circumstance where using the app would be easier than the old way. Boil down the system to the parts of it that you feel will be truly useful and then see if it's worth the cost. I don't think it would be for me, but that's me....I'm not trying to talk you out of this by any means. If you've already done this and have decided it's for you, then I wouldn't hesitate to get it.
There's also a new system called Ready Camp for the big DP Class A's that has a fob with a "camp" button it. One push of the button and the jacks go down, the slides go out, water heater turns on, awning goes out, etc. Of course what happens when you push "Camp" is all pre-programmed using the tablet. George Jetson has arrived!
