I'm 6'3" and just received the XL... The bottom of the zipper/jacket ends about mid crotch, probably just enough that you might sit on the edge of the jacket when you sit on the lift... not by much though. I think I could still rock the L though, the sleeves are super long and the jacket is baggy. I like it a bit longer/baggier though, less cramped if you have to layer. Actually, I think that the XL is large enough on me to defeat the purpose of the pow grip strap, which seemed loose around my thumb, but I was only wearing a t-shirt and no gloves when I tried it on.
On another note, I got the Measurement Plaid, and the blue highlights in the jacket, which look minimal on the website, are actually way more noticeable in person. Not that its a bad thing, but up close there is a lot more smurf action then you would think when ordering it.