H-girth in all its glory.
So far, I have really liked it. I started to say that I hadn't seen any changes, but then I realized as I was typing that my balance issue at the trot resolved right around the time I got the girth. This may or may not be related to the girth I don't know. But I do know another person that got this girth and it helped to stabilize her saddle so it wasn't sliding up her horse's shoulders.
All apart for that easy cleaning I was talking about
Well padded center piece
I think the quality is excellent (it is made in England) and I haven't had it long enough to know how it will hold up. So far it has not shown any signs of wearing or stretching. The center piece is well padded and my pretty pretty princess has not had any rubbing issues. The two leather straps are completely removable (easy cleaning). The biggest drawback is the price. It is 185 pounds (~$260 US). I will say if you have a common girth size you might be able to find one used on eBay (UK not US). I almost bought one when I got impatient trying to wait for my free one, but the lady found a UK buyer and decided to go that route.