i've never used them, but despite what people have told me about it being fun... i've always found snowbladers to look tremendously awkward and out of balance doing anything really. my bro did it for a season and then went back to skiing and considers it a black spot in his life that he wishes never happened. but yeah, i dont know.
Dont buy snow blades their crap. If you wanna have a fun ski use junior skis its so fun on rails and small jumps. But i would advise you to take it on anything big because your going fuck your self up.