We couldn't be happier with our whole experience of JAS... They are a fantastic bunch, and the best aftersales support I've ever had .... With anything i've ever bought pretty much!
They were a real pleasure to work with, endless patience, and always very clear and accurate with pricing. At no point did they change prices, or conceal costs to spring on me later. The fitting is extremely high quality and FAR more robust than most other options out there, and I did a lot of checking. We have been round Europe 3 times now with not one fixture breakage... And that is saying something!!
The practical advice you will get from them will be absolutely honest and clear from my entire experience. As long as you know what you want, they will build it in... And if it's a bad idea they will advise you beforehand, then at least you have the option. It is worth taking their advice on design and fittings... They are doing it all day long and know what works and what doesn't. I found their advice invaluable when we were planning the layout etc, and it all proved to be right on the money. There isn't anything I would have done differently given the chance, we are really happy with all aspects of our conversion... Even after 17,000 miles over 3 years... In every climate... And we've been in a few!!
As for all the boys in the company, they are solid gold, and I don't say that lightly ;-)