The best part of Great Wall is the food, which is excellent. The worst part in the past has been cleanliness of the place. That seems to have changed. The place is neater, and I feel better walking in. Don't get me wrong, it's still primarily a Chinese take-out place, and very much looks like that. However, there are a few tables, and I wouldn't hesitate to eat in the restaurant if I had a reason to. Definitely your best Chinese option in Hyde Park.