I often stay here as its usually the best value in Nottinham for a good, chain hotel, walking distance to the centre, with parking. I don't want to be right in the centre. For reference it took us less than 15 mins to walk back from the Castle Inn. It's right by Sainsburys (including petrol), McDonalds and a retail park. Rooms are usually good, clean with desk, small table and chair. Tea/coffee in room. Breakfast is good, have not eaten dinner there. One irritation is you do have to pay for parking £5 for 24 hrs.
Will definately keep going back as long as they stay competative.