Previously sworn by Autoglym Fast Glass, which is a great product. Thought I'd try this because of success with other Dodo products and, well, its very good. Seems to very quickly clean glass to that squeaky state when you know its totally degreased. Also worked well when sprayed directly onto a cloth to work on the inside of the windscreen - I don't like spraying product inside the car because it goes everywhere. So, buy some I say.