Well I had heard good things about this so purchased a copy off ebay for £18 from some place in canada. Used it to calibrate my projector and I have to say well impressed. Definate improvement in quality. Blacks are better, definition is better colours are better, The settings I ended up with I would never have dreamed of or be able to obtain without their test paterns. Only done the projector so far. Sub, speakers and amp next. I am going to give it a wiz on the plasma as well I am that impressed.