Someone had had a bad experience with it before so i said look ill do a couple of windows for you, if your happy ill do them, if not no worries. She did, kinda begrudgingly (sp?), so did them and she was hapy for me to do them. 6 months down the line she complained, i went back and i really culdnt see what the fuss was about did the apparanlty effectted windows again to keep her happy and then she rang up again and said "theyre no good again i knew the system was a load of rubbish and doesnt work"
...i never went back again...dont spend all this money for people like that!