These saddles are not completely problem free. I have a horrible sense of balance which caused me problems until I got myself full seat silicon tights/breeches, in fact I heavily recommend that everyone who rides in one of these saddles use the full seat silicon tights/breeches.
You see, unlike most saddles, the shoulder can come under the flap without being blocked by the ends of the saddle tree, and when the top of the shoulder got so far back my seat was literally shoved across the saddle seat. Without much of a sense of balance I just could not tell, it took my riding teacher showing me a picture she took on her phone to realize something was wrong. The full seat silicon breeches fixed this for me.
You will probably have to tighten the girth once you are in the saddle, sometimes more than once, more so than with regular treed saddles.
The horses like this saddle just fine. Even when I was a few inches off center the horse I was riding, who specialized in balking and backing up rapidly without me telling him too, did not get upset at all. Believe me, if he hurt he would have told me emphatically and immediately, he was not a very forgiving horse at that point.
Get a six pocket shimmable saddle pad too. I use the Contender II BOT/ThinLine pad, but any six pocket pad should work. Mine came with an 8 pocket saddle pad from the dealer and I could not get that pad to work at all for the rather saggy backed elderly horses I often end up riding. The panels on the saddle are rather flat and they are foam so the panels cannot be stuffed to fit the back of the horse. That is why you NEED a six pocket shimmable pad, especially when you ride several different horses with different types of backs. Just remember to add or take out shims if that particular horse needs his own configuration. With the six pocket pad I was able to make this saddle work on the horse with the most sway-back/croup high horse I’ve ever ridden. I just take the shims out for horses with “normal” decently muscled backs.
Another plus point for me is the lack of the pommel arch. This REALLY helps when I get up on a horse whose back hurts. I can scoot my seat around an inch further forward and the horses with ouchy backs really, really, really appreciate this!
I hope you can find one. I LOVE this saddle, both for the horses and for me. Plus if I ever am crazy enough to buy another horse (hey, I’m almost 70) I have absolutely no worries about my saddle fitting him (with the six pocket pad, of course.)