Well a double t is not good quality. I would never consider one, ever. These are a toss up. Their barrel saddles are junk, anything that costs less than 500 new and has overly done up bling is usually a good indicator. But some of their other saddles are very pricey, so it might be a deal where you get what you pay for. You pay cheap, they give you cheap.
No mention of what the tree is made of-just busy promoting the disciplines who have supposedly bought their saddles. Stay with a well known name. If they can sell a roping saddle for $699 I highly doubt it would withstand the jerk of a large calf. Many cheaper saddles use cheaply made fiberglass trees which may or may not stand up to normal riding. I've had emails about these from riders wondering if such a tree can be fixed when it broke. Often the leathers are of urine tannage, not oak leaf tannage as US tanned leather is. I've seen stirrup leathers made from a weaker part of the hide when you want them from a strong part of the hide, to hold your weight, not stretch. I could go on.....
I know that some of the nicer brands are getting cheaper and the cheaper brands are getting nicer. I saw a new simco at the tack shop and was SHOCKED at how gross it was. I also saw a king series and actually seemed decent. Tahoes.....YUCK...Silver fox? Some of the bridles are ok but that's it.
The leather of the simco that I saw was so poor. We bought a double T for my cousin for her birthday and the leather is actually really nice. I have had a few silver fox bridles that were sturdy and used a lot. I even had a suffolk bridle that was really nice.
My friend has one of their training saddles (I'm almost positive it's a Stallion anyway). I've ridden in it a couple of times, and I can't stand it. The seat is so wide it's like trying to straddle a couch, very uncomfortable. As far as quality goes, I guess it's not terrible. He's had it a couple of years now and it's still going strong. I personally wouldn't get one. Look for an older used name brand saddle. You can easily find used Billy Cook barrel saddles in the $500 range and the quality will be much better.