I've had windows installed in September 2022, immediatly noticed that the vents that came as standard were not the ones advertised in the website, is stated they were premium, but got installed shabby horrible things, after 2 months of calling Safestyle, finally had an engineer to see me... he wasn't helpfull at all, but agreed that the trickle vents installed were the wrong one, and in November there was a request for the vents to be put on the 23rd of December... im still waiting, despite inumerous calls made, and it is now the 15th of May 2023... worst customer service I have ever experienced. Do not recomended safestyle at all.