STL = best park ski ever!! hands down!
(and it works outside of the park, too!! no doubt! I had the 183 last year, and it's 84mm underfoot! keeps you floating in the pow, no prob!)
I have never met a person saying he didn't like the STL's! it really is mindblowing!
(ehm... never tried the thalls, though... i'm sure it's a great ski, too!)