Skito is nice becuase they'll custom make your shims, and they're all beveled. That makes for a nicer transition from shim to no-shim. Their 1/2" foam compresses, so it's a minor lift, even though it sounds like a lot of thickness. They're also good about using photos and information from your saddle fitter to create the perfect pad for you.
ThinLine pads are nice if you need only very minor adjustment. The Trifecta pads are my choice. Their "saddle fitter" pad is more limited in your shim options.
Mattes is WAY overpriced IMO. I like Fleeceworks much better for that type of pad. Their quality is just as good, but the price is so much more reasonable.
And that is all I am looking for is a minor adjustment. Right now all I have is 1/4" in the back and about 1/8" in the front, including the pad.
The problem with the Fleeceworks is that it doesn't come without the fleece, and the pads are flimsy. For $40 more, the quilted Mattes correction is a way better option for me.
As far as the Thinline - I wouldn't be getting the Saddle fitter, I would most likely be getting the trifecta again because of the fleece.