I tried a dressage version on Thea a few months back and we didn't get on with it at all. Resulted in a bronking fit from Thea, the first in nearly a year (since her ulcers cleared) she wouldn't go forward in it and when asked exploded. Back in her Vogue and she has been fine.
I also worried about the panels as the only time they seemed soft was after the saddle had been sat in the car all day on a warm day, then they went REALLY soft.
That said, they are nicely made (the one we tried was the 'L' fit and actually felt a fairly flat seat and wider than the vogue which was weird.) the tree system is genius, and I know a lot of people love them. They seem to be rather like WoW saddles - they either work brilliantly for you or not at all. (WoW worked fabulously on Mai, but again Thea hated the one we tried on her).
I wish they would make a traditional flocked saddle on similar trees.
As it is the strada is not for us.