You are a well respected company with loads of great reviews on this website. I would definitely consider your company for any window replacements we might do in the future.
but - to respond to you - we do have a 10 year guarantee from the London Door Co so I think my point still stands.
And BTW - It's probably not very fair to second guess what guarantees another company have given us and then post that as 'fact' ....
For a door (which is what the post is about) my recommendation would be the LDC. They were the better company for us to use.
There are many other users of this website who highly recommend Ayrton so don't get too worried or defensive if you don't always get glowing reviews