Vufold, do supply good products. Bi-fold doors are great but I was not a big fan of the Aluminium Window fixings which are a little odd and make finishing the walls/plasterboard a bit more of a challenge. The Largest challenge I had was with the Aftersales team who had a supply issue with the items informed me that the build was delayed, and thus they delayed the build for weeks (which included my workforce suddenly not working as we were not in a position to move on to the next job). They also said the items ordered were contracted in even though the windows where not a custom build and just straight off the website. So we could not even cancel the order and move on. This was not made obvious at the beginning. I have not used Vufold again and use the alternative door and window suppliers as the lady who handled the after-sale was incredibly rude and at times I felt she was lying to me to keep the sale!