They've been going for a long time, and do a lot of voice work. There are pics of the studios on the website so make up your own mind. Edinburgh doesn't really have any mega luxurious studios, but I think you would be in good hands here. They do a fair amount of advertising work so are well set up for client care.
Used Red all the time when I was based in Glasgow. Max is a good guy.
Cannongate was patchy mainly due to staff changes
Pricewise Red id about £150 and hour. My old company is Savalas in Glasgow. Much bigger and broader experience than any of the facilities in Edinburgh.
Never a big deal to have talent come through from Edinburgh - its an hour train trip www.savalas.co.uk. Depends on how much you are doing. Adr got to Savalas, quick Vo then Red