I ate at Maggie Jones's last night, in Kensington. I can say without reservation that the Haunch of Venison was the finest venison I have ever tasted.
I asked for the meat cooked "as rare as you like" - my usual defence against getting rare that's rather closer to burnt than I prefer. It arrived perfectly so, and the sauce was delicious.
Of course, at nearly £18 for a plate of meat in (rich, deep, flavour-full) sauce, you would hope that the kitchen knows what they're doing and delivers on it. But I did enjoy it very much, and I told the kitchen so.