I like the way it looks so far! It seems to really be coming along. Good job. I do think that the boot is a bit big. I may have just missed it but, how did you find the scale for it? Also, it looks to me that the shin might be a little bit small. I only say that because of the distance between the bottom of the shin and the top of the boot. As Longshot-X told me, it looks really good to have the same amount of space between the two pieces of the boot and the boot and the shin.
One more thing, I noticed the way that you pepped the boot. You left the small, more difficult details for last. Who knows, it may work great for you, but in my experience it's easier to do those kinds of things first rather than trying to manipulate the entire piece to get that little piece in place. Just an observation
Like I said, great job!
-Poly