Chelsea's Kitchen is, hands down, the best sit-down restaurant at T4. I love them for brunch or dinner. Service tends to be 4/5* but food is always good. Drinks are good too. My favorite is Dr Losen Riesling and they always have it. Have I had sub-par experience? Yes? Have I had great experience? Yes and yes. All in all they deserve a five-star rating for their salads alone.