We have a full width Reimo Variotech 3000 bed system. The seat unit has 3 seats with belts and can be moved forwards or backwards. Our short wheelbase Kombi T6 has 5 different positions. It fits on rails that are bonded to the van floor, so must be fitted by an expert. Very easy to make the bed and you sleep on the rear of the seat and back rest so no seat belts the get in the way. The only issue is they can rattle which could drive you mad when driving. Some people we talk to have no rattle issues, unfortunately, we do.