couldn't ask for more
Is very happy or content; doesn't have any further requests to improve something because it is exactly as desired. I'm just thrilled with my new job—I really couldn't ask for more.
(I) couldn't ask for more.
Inf. Everything is fine, and there is no more that I could want. Bill: Are you happy? Sue: Oh, Bill. I couldn't ask for more. Waiter: Is everything all right? Bill: Oh, yes, indeed. Couldn't ask for more.