I haven't sailed in a mini suite, but suspect that it will meet your expectations. I would opt for the alternative restaurants rather than the traditional dining. I had a group n theStar in Alaska and did a thorough review of her (as did Nancy Norris) that you can find on the Norwegian Star Hoe Page.
You child will have a wonderful time as there is tons of spac committed to children on the Star. It is a great choice for families and I believe you will have a great cruise. Be sur to sghare your experiences when you return by writing a review.
Have a great cruise!