

Man: Have you seen the new office cafeteria?
Woman: No, not yet. It is nice?
Man: I'll say. It's like a palace. You won't believe the selection.
Woman: Oh, I'm excited. I'll have to check it out for lunch today.
Man: Have you seen the new office cafeteria?
Woman: No, not yet. It is nice?
Man: I'll say. It's like a palace. You won't believe the selection.
Woman: Oh, I'm excited. I'll have to check it out for lunch today.
I'll say: a phrase used to express yes to a yes/no question, usually in the past tense.
Bob: Was the book hard to understand?
Joe: I'll say. I had to read it twice to understant it.
You won't believe: You would be surprised
You won't believe how much it cost. It was really expensive.
Check out: Go and see or experience something for the first time.
You should go and check out the new mall. It's really nice.