It is good, and in my humble opinion a pie can look every bit as festive as a roast! Also, while it does take a lot of chopping-action etc. the filling and the pastry can easily be made the day before so you avoid having to spend the entire morning cooking the Christmas lunch! (I know it's more or less an English tradition that the housewife get's up at six to get the turkey in the oven, but really; if you're going to have christmas in the morning then why not make it so that one person isn't stuck in the kitchen for the duration of it?)