We have a Tucker Gen II Endurance model that we use on a mare for long distance and she has competed in a 30K Endurance competition with it. We use it with the Skito Dryback pads. It has the Enduro rigging.
As with any saddle you have to have it fitted to your horse. The dealer we purchased the saddle from helped us with this and we did the measuring (both horse and rider), templates and photography work. When the saddle arrived it fit both the rider and horse perfectly.
Although I prefer a close contact saddle, I have ridden in it and found it quite comfortable even though it was a few sizes too big for me. My original comment was that it felt like riding on a camel saddle as I felt I was high up off the horse's back. That sensation soon went away as you can feel the horse movements quite nicely. My husband, to whom this saddle belongs, says it is the most comfortable saddle he has ever owned and it has eliminated his knee pain and leg discomfort on the longer rides.
Positive observations about the saddle and riding it on a non-gaited horse are that over the course of the first week we saw a distinct difference in the fluidity of her movement, in particular the extended trot. After a month we did several gait comparisons, before and after tests using our GPS, and found that her extended trot speed had notably increased to the point where it is worthy off mention. The saddle fits extremely well. Our sport is long distance mountain riding with much off trail work. The substantial climbs and descents are a great way to test a saddle and it sits well with no need for a crupper but we do use a breast collar with all of our saddles. There also is the option of a wider stirrup base which please my husband.
A negative comment is that I do not like the dyed leather. I find the color runs when cleaning and when I mentioned it to the seller she told me that she had had similar feedback from other clients. There is product they sell you to apply to your saddle if this happens. I did have the color transfer to a pair of light colored riding breeches during a rainy ride. This in itself would be a deal breaker if I was in the market for a new trail saddle.
We purchased the cantel and pommel luggage for the saddle and they are absolutely wonderful. Great quality leather and very well made.
Just a note... when asked, the seller did mention her concern about the Circle Y acquisition and said that many Tucker dealers and sitting back to wait and see how their production revisions might affect the quality that is a signature aspect of the Tucker Brand name.
Hope my input makes a contribution. If you are looking for an outstanding saddle, check out the Gaston Mercier which is manufactured in France. I absolutely love mine and will never change from that brand.