Outfit looks awesome and fits her style, especially the hood at the back and grenades/whatnot on the thighs makes me happy.
She doesn't have enormous tits, like some of the other unnamed skins you can find here. (Come on, guys. Stating you specificly want bigger breasts just makes you immature.)
Hair probably ruins some hats. (According to the comments. I've not yet tried this skin, but I definitely will!
Hairstyle isn't really to my preference.
I noticed there not being any audio in the videos. I have the feeling she doesn't have custom sounds?
Additional/Optional hairstyles. Especially short, straight hair. ♥
Custom sounds? I know that she doesn't exactly talk, but the original Pyro's enclosed mask would logically muffle his/her voice entirely. The kind of mask she has in this skin wouldn't be as effective, thus her sounding more like a girl would be pretty reasonable. Especially since she's obviously a female, as the model shows, unlike the original.
Do NOT give her bigger breasts, she looks much better this way. D: