I purchased this from the Derby store and tested it on my Acer Travelmate 4150 which has a 15" XGA TFT LCD screen. The improvement of image in terms of sharpness, contrast and clarity on this type of screen is superb. I think there would be less image improvement on a crystalbrite screen.
I rang the manufacturers (path.co.uk on 01844219000) who informed me that the product is being sold off through PoundLand and will not be replaced.
Whilst the product is intended for a standard pc screen, it's suitability for use with a laptop at home is spot on.
This is a quality product.http://www.4barmey.co.uk/cgi-bin/product.pl?PID=1079198_amp;item=1149764_amp;section=98816_amp;path=79916,98816