He does say its a very rough guide , and you don't want to scare away potential customers with too high a guide price, easy enough to talk them up a bit when you get the call
I have used this facility and found it to be fairly accurate.I priced up my house and it came out spot on to what my window cleaner charges me (although that is fairly cheap because I pay by standing order and the chap does a fair bit of work for me!). I also priced up a 3 storey guest house that I charge £25 for and it came to £27. pretty good I think.It came within 50p of a hotel price that we do. I think that I am going to stop working out the price myself and log onto your website instead!