Milk snob cover/car seat cover?

Any one used one or planning on it? They lookl awesome. It's a car seat cover that doubles as a breast feeding cover to!!! Check them out I think they're only like 36$ The only question I have is...they do look supper stretchy but I am a plus size momma and all the people I've seen use them and do product reviews are pretty slim so...just wondering how they fit for a bigger person??