We have three flat screen LCD screens in our house, bought at various different times, of three different sizes and of two different makes, and I tried this product on all of them.
For smallest and newest, it worked perfectly, just damp the cloth as they say in the instructions, wipe the screen with it and then turn it over and wipe it dry. The screen looked as good as new.
The other two screens, one 30" and the other 42" are older. It took a bit of elbow action to wipe off some of stuff that has accumulated on the screen but again it worked a wonder. No streaks as advertised and the screen looked fresh.
The only problem that I encountered with the bigger screens, is that the cloth sometimes leaves bits on the screen and you have to wipe it a couple more times than necessary to get the bits off.
Despite this I would recommend this product to anyone who has a LCD screen. Also the bottle of fluid it come with is quite big and I didn't need to use much of it to clean all three screens, which means it will last a while. And the cloth looks like it can be cleaned easily if necessary.