This is as easy to fit as claimed. There are just 4 plumbing style compression fittings to do, and a simple bit of wiring which is well labeled. After pressing a valve to dispel the air in the pipes you are ready to plug it into a 13amp socket/fused outlet. The hard bit might be making a hole in the wall. My 2ft thick stone wall had a useful hole already and the wall bracket which sounded expensive was in fact really well thought out. No problem fastening it to a lumpy stone wall. Because the unit is a bit like a fan heater, the room heats up fairly quickly. Its cover is a bit plasticy the way it clips on but I think that the filters could be cleaned with a good vac without removing the cover that often. The instalation instructions could be a bit bigger, the illustrations are a bit tiny. They look like they have been photocopied and reduced.