In hindsight, I would have requested this option as well . I saw their standard double glazed doors on site the other day and was a bit disappointed. When working with quotes from other builders (like Arden), they automatically upgraded the windows to the Boutique range when double glazing was involved.
Agree with your comment on the Kitchen Culture staff. Our consultant had a great attention to detail and she got everything right on the first quote. Hoping their workmanship hold up to standards...