I am a self builder and have dealt with loads of suppliers. I wanted 2 aluminium doors because the GRP ones looked awful. Alpine came up with an excellent price which beat the GRP doors and made in UK. Whats not to like! Excellent and charming customer relations. Good lead time but they deliver a frame and an insert panel separately. One of my panels went AWOL and turned up damaged. I must say AA sorted it out eventually. All in all of all my suppliers I have a secret love for AA. The delivery was a F'up but they sorted it out and their customer relations were charming. They are a UK manufacturer and I really wanted to support the home grown as I had done enough of ordering from Germany. The product was good so 4/5