My dressage rider OH used to swear by them and still rides in his if he has a horse in for training but since he got sponsorship from another company he does not use them as much obviously. If he had not been offered sponsorship he would most likely still be riding all his horses in them.
I may be wrong but I thought they'd stopped making them. I've seen a couple - nice quality as you'd expect, deepish seated dressage saddles with quite big blocks. Would suit curvier backs rather than very flat backs.
I've just recently bought a second hand Spalding, and apart from the horse it is the best money I have ever spent. It's so comfortable and the change in my riding and the horses way of moving is great. The best thing is, especially with a slightly green horse, it keeps you in the right position to stay on.