If you're doing the Anonymous thing and just want to hide your face, it will work.  If you are looking to create an authentic looking "V" costume, from "V for Vendetta," then it's certainly closer than those yellow-tinted masks out there, even the "authentic" one, but it does have a few cosmetic and functional flaws.

The mask arrived packed in a cardboard box which served it's purpose of protecting it, so it wasn't damaged.  It has a durable elastic band, and it is certainly thicker than the cheap Halloween versions.  However, it's not as close to actually looking like V as it could be.  It's nearly transparent.  If you have dark facial hair, it will probably show through this mask.  If you use a ski mask to cover your neck and sides of your face, like V, the mask will look darker, which may actually help it... but you'll have to replace the white foam spacers inside the mask with black ones because they will show through.

As for fit, it's not bad, but it's not great.  I will be blacking out the eyes with a dark material I can see through, and I'll have to put a bigger piece of foam on the forehead so the material isn't right up against my eyes.  That will cause the hat to actually sit on the top edge of the mask.  I'm not sure how the wig will work with that yet.

They also left off the pink color on the lips, although the cheek blush is there.  The nose  is a little bigger than it appears in the movie, but not everyone has a small nose.  Keep in mind that the mask Hugo Weaving wore was formed to his face, and having one made like that would cost a lot more than this mask.  In all, it's not bad, and in all of my searching, it's probably the closest to V that I have found.  If anyone has found a better one, please comment or send me a message.