We ate in the Crown Grill for the first time on our Christmas cruise on the Grand. We're quite small eaters, so these kind of meals are generally wasted on us, but we had a free voucher so we thought we might as well give it a go.
I had the filet mignon, and it was nice but not amazing - to be honest the one I had in the main dining room on NYE was nicer. My travel companion had the lamb chops and also said they were good, but not amazing. We ran out of room for dessert, so they packaged up a couple for us in a takeway container which was nice. I took a bite out of each but didn't love them. This is the trouble with food, it's all so subjective. All I really need to keep me happy on my Princess cruises is their oatmeal cookies, I love those things.