TESA Electric Levelling

Just in the process of buying an Auto-Sleepers Symbol Van. I really want a self-levelling system. It's only a 5.4 metre van and the underside is quite cluttered with spare wheel, two water tanks, a gas tank, a space heater as well as the vehicle fuel tank and silencer. One more issue is the limited storage space inside this small vehicle - the largest storage space is under a shortish sofa, but this already houses a water heater and the battery, enclosed in a battery box.

I had hoped to have a MA-VE hydraulic system. Usually the hydraulic pump and tank is mounted below the vehicle in a box, but there is not enough room for it there, so it would have to go under the sofa and considerably decrease already limited storage. Similar issue with E&P. One alternative the dealer has suggested is a TESA electro-mechanical system.

Has anyone got one of these, or had direct experience of them? Any known issues? I'm not looking for opinions here, but information - the experience of anyone using TESA levelling, or information passed on from users. So if you have a TESA levelling system or have spoken to someone who has one I'd be most grateful for your input.