Never ridden in a Jeff Smith, but hearsay is if it fits, people love them, but if it doesn’t fit, people feel like they push them forward, don’t have a “pocket” that balances them over the horse.
Reiners tend to not favor them because it can make stopping harder work for the rider to stay in the right spot to go with the horse, if rider conformation is not right for those saddles.
Plenty of working cowboys like them as working saddles, more refined arena training riders prefer a different seat.
Some working cow horse riders seem to get along with those saddles also.
I will say, as an English rider first, a western saddle is my last choice, even a track exercise saddle feels better than the “bump on a log” feel of western saddles.
Never feel as comfortable training horses in a western saddle even after decades of using them when necessary, like on longer days of ranch work, where western saddles are easier on a horse’s back with so many hours of long, slow work with quick burst of action here and there.
Western saddles do spread the weight better over a horse’s back than English ones when just sitting there walking along for long miles.
OP, you may always feel a bit off in a western saddle, but the right one for you will sure feel ok when you find it.