They were ok, not brilliant but OK. The finish on the seals are not 100%, there is little bits of some sort of sealer protruding between glass and frame, and some of the black seals are not perfectly seated.
Not enough to cause a complaint but slightly irritating - a casual finish in the factory is the cause.
I wanted to fit them myself but was told that they would not guarentee them if I did so I agreed to pay for the fitters to do them. Bad decision. The fitting was shoddy, unfinished and 3 of the windows leaked inside. Only one window was mechanically fixed, the others glued with foam and sealant.
I had agreed for them not to do any finish on the inside as I still have building work to do. But when they left, none of the outside was cleaned or any of the protective wrapping removed.
I have rectified the problems myself. I would not have those fitters back again. I have asked for some UPVc solvent to clean them myself but I have had no response from the second fitter who came out.
Would I buy from them again? I probably would but I would be far more picky over minor issues, not make the final payment until all was completed and I certainly woudn't have those fitters back again.