We spent 4 nights over Christmas 2008 on a package booked with Saga.
The hotel is a few minuts walk from the centre of Newmarket and next to some racing stable yards and the "gallops". Excellent for horse spotters.
The hotel was rather too warm but comfortable and clean with friendly and helpful staff. The Christmas package was excellent and the cost in line with other packages available with other operaters.
I would go again but there are too many other places to try first.