I bought the 50 amp Progressive portable version myself...
thought about the installed one since it was cheaper, but glad I went with the portable now that I've gone through 2 more rv's and carried it with me
Never lost a minute of sleep about it being stolen.. sure it could, but we would know immediately if we were in the coach - the power goes out
Actually had a park 'electrician' tell me there was something wrong with the ems that stopped the power from getting to the coach !
I said NO there isn't - IT'S telling us your power is bad - fix it or move us ...
One real plus for the PI setup is that it monitors for brown outs too and will shut down if the power goes to low... real peace of mind !