I so love those things!
I'm not at least concerned about germs. I've had the reverse of a sheltered childhood and I strongly believe that every child should eat some dirt at some point of his existence
However, these things are so practical. Just put your hand and presto, here is your soap portion! No more fumbling around with the soap, soap suds everywhere, messing everything and so on. And I'm a frugal at heart!
The one I have right now it's ridiculously well made. You have soap level sensor, battery sensor, back-lighting, custom-made LCD, soap dispense amount settings, made and designed in Turkey. Everything! Maybe one day I will open it up and review it!
And btw, I'm using a home-made soap nuts mixture that's totally ecological and quite practical!