If I were buying a new MH it would have to include an internal integrated EMS. No deal without it. I think EMS is that important. I have a complete readout of everything in my MH. The internal system is absolutely awesome and worth every penny you pay for it. I was in WA state at an RV park. Employee told me there was nothing wrong with his power outlet. I invited him inside. He looked at my control panel readout and changed out his entire box. The readout tells you how much current each and every ckt in your RV consumes.