Work involved replacing three single-glazed windows incl one former sash, with two top-openers and a tilt-and-turn to match existing windows from another company who are no longer in business. C.W. gave the lowest price of the local firms I invited to quote, and their product and work were of a standard that it would be hard to beat. They were very efficient and yet still pleasant to deal with at all stages. I have no hesitation in recommending them based on my experience (and my experiences with other companies in the same field over several years).