I had the full service and redecorate of three large sash windows in October 2019 and I am very disappointed with the quality of the interior paintwork, which had started to flake and split on all three windows before a year was out. I had expected (but not checked) the redecoration to be done with oil-based (gloss) paint, but they used some kind of acrylic paint instead. I've had them back to look at the work in October 2020, and they said they would get their decorator back in to patch the windows where they have flaked..but its nearly the end of December and I'm still waiting... On the positive side the windows move much more easily and are more draughtproof, but I am really not happy to be needing to have them repainted within 18 months of the original work.