I use this engine in a full slatted wooden bed with a very high, quite heavy 7-zone cold foam mattress on it. The "device" was perfectly wrapped. Unpacking and installation are easy (but you need a helper here). It is processed in a professional and high quality. The engine works by means of a cable remote control properly, quietly and now since 2 months very reliable. The settings are for my needs more than adequate. Especially the possibility of Raised leg position are ideal for me. The back-head can travel a considerable distance to push off what is particularly useful when reading in bed beneficial. The different "zones" show different "hardness". Just for a backs injured the right choice (but only in conjunction with a very good mattress).