Is valley girl accent grammatically correct?

I know you probably think that valley girl accent is kind of lame since most of you are from US but for a foreigner it’s a very unique and cool way to converse with other people. With that in mind, I am curious if adding “like” a lot and pause occasionally in a sentence will disturb people’s comprehension, in sense of grammar.

i.e. Oh my gosh! Like, who likes to eat cheese, like, that’s so yesterday, like, you know, duh! Like, seriously!

Additionally, what do you think if a foreigner talk like that to you? Will you appreciate it?