Hi there, Outlook have just finished doing a loft for us, and I would definitely recommend them - as others have said, they work to a high standard and the guys on site are very professional and pleasant to deal with. Much more so than some other, ahem, construction professionals that we have worked with. It's worth noting that the design and the building work is done by two separate but related companies - this wasn't completely clear to us at the start, and I have to say I found the builders a lot more responsive and easier to interact with than the designers. But that's really a detail. The other thing to bear in mind is that they tend to have long lead times - although from our perspective that was a good thing, since it indicates that they are in demand. PM me if you want any more specific feedback.