We had one in our last house. OH put it in, ran the pipe work behind/in stud work.
Downside was we had to have a long 'snake' of pipe to get to all the corners as we didn't put in enough hose-plugins. It doesn't stretch so make sure you can get to all the corners from the access points.
I loved the plinth 'sucker' in the kitchen - the grandchildren made crumbs just so they could brush them to the 'sucker'
Make sure you put the vacuum cylinder out in the garage as we made the mistake of putting it in the utility room and it does make a noise - sounds like a jet engine. And if it's in the garage you can plug in to clean the car.
I miss it now as I drag a unresponsive Dyson around that keeps tangling it's electric lead round my feet...
