I think the SST is a great bullet. Although I have never taken game with one. I have seen a lot of photographs of game taken with the 250 grain shockwave and it did a great job. If you are confident in the bullet then that is all you need to know.
No matter what bullet you shoot, there will be opinions. And an opinion is just that, an opinion. Personally I like the 200 grain .40 caliber Shockwave and if I were field hunting, that would be my bullet.