I love it. Though SOMEbody scribbled a bit on my leg, making it look a bit scribbly >.>. The tail could have used some blur so it would look a bit more like the ref, and maybe you could have used autocircles for the snow on the ground. But still, AWESOME! .
Nice! Also, I think it's important to note that snow leopards, more than any other big cat, have very thick bushy tails to keep them warm, so the proportions of this are actually pretty accurate (although it could be a bit fluffier, hehe).