We got Munster Joinery in a house we built and I would not recommend. This was a brand new house they were fitting them in, they came to measure and then when they were fitting the windows the knocked out parts of the surrounding blocks. The builder and my husband had to foam to fill the gaps. The handles on the windows that were opened regularly got a bit dodgy after not too long. Overall I wouldn't recommend and would never use them again. The house we've moved into now has senator windows, and am not impressed with them either. Massive draughts and loads of the windows don't open.