Aerostich has a 100% 30-day refund/return policy, so it's no risk, unless you crash in the suit...
OK, one place where the suit may be deficient is venting/cooling. I started wearing it in December, so I can't really speak to how it is in hot weather. It has some kind of anti-UV treatment, so Aerostich claims it's 30% cooler than regular black leather. It is perforated, but the perforations don't really flow air because of the Gore-Tex. There are no vents (other than the main front zipper), but you do get a little breeze under the arms and on the sleeves where there are fabric stretch panels. There's also a large back vent similar to the Roadcrafter's. Overall, it feels very light, so I'm going to go out on a limb and say it will feel similar to a Roadcrafter or other textile overjacket in the heat. Over 90 degrees I think it would be uncomfortable, but so is anything except mesh, right?
If I had to only have one riding suit...I would still go with the Roadcrafter. But if I really had to have leather, did a lot of riding and had the money to spend (and god bless you if you do, these days), I'd think hard about the Transit.