I was doin a load of them recently for a builder, 4.5 m2 with chrome trim all round both sides and window, 4 inch tiles, first one took bout 4 hours but after a few got that down to just over 3! They are basically all the same so you get to remember all the measurements and cuts, only awkward bit is the cuts up round the hob extractor, diagonals on both sides, same company just started another 450 houses so better get the ts 30 out again!