I have the TSF too. I’ll agree, the leather quality is mediocre. The outside is a fake-feeling, plasticky type of leather - but it cleans up well – while the inside (the side that touches the horse) is kind of weird soft leather, I’m not sure I like it. It’ll get dry and hard after only a few rides without a wipe-down, so I have to pretty much wipe it down after every ride or it’ll quickly get these ‘dirt-ridges’ - not sure how to explain it other than, I have had leather girths I haven’t cleaned in months that don’t get this, so I think it is a product of the leather type.
I don’t know why I bought the TSF, because my horse isn’t girthy, doesn’t need shoulder relief, etc, so I might not be the best person to review the product - I think I just wanted to feel better about the inherent discomfort that comes from girths, since I cannot imagine in any way shape or form a girth feels good for a horse. I kvetch when the elastic waist-band in a dress is too tight, so…
The girth is great at keeping the saddle in place and secure. I notoriously ride with too-loose a girth, but this girth even loose does a good job of adding stability. I have not noticed any sliding back. It also gives plenty of elbow clearance.
One thing though - do not judge by eyeballing if the girth is loose or not. Judge by putting your hand between the billets/body. It can be deceiving sometimes and look much more loose than it really is.
One thing I have noticed, is that the pressure is not unilateral/the same front to back. When used with my brand new XC saddle, with its brand new, not-uneven billets, placed on the same holes on both sides, there is a big gape towards the front of the girth (close to the elbows). It doesn’t bother me and doesn’t appear to bother my horse, but it can and does make the girth look looser than it really is. I have the same problem with my dressage saddle as well, but not as extreme.
It does not work as well in my XC saddle as it does my dressage saddle. No surprises there, probably has something to do with the difference in billet placement in both saddles.
I do think the TSF girth is more comfortable than a standard girth, and I use it for that reason alone. Overall I think the value is good, the design is sound, and if I had to buy it again I’d probably get a sheep-skin just for extra measure - my only complaint is the leather quality which is just so-so… but the design more than makes up for the lack of extraordinary leather feel.