I've used fibreglass many years ago for canoes etc, but this was my first job for years, so I'll class myself as a complete novice. I had a small flat roof to do, so I watched their videos, and ordered a 5m2 600gsm flat roof kit with 4 trims and a bandage roll. very fast delivery, and the kit was good, I wasn't short of anything, and didn't have a massive excess left over. There did seem to be quite a lot of catalyst for the amount of resin in the kit, so I rang to check I was doing it right, and got a very helpful response even though it was last thing on a Friday. Really really pleased with the results, I'll use this firm again and I have no hesitation in recommending them.