Very informative, allow enough time to go around everything. When the Roman Walls were discovered, the site's history went back a thousand years further than previously believed with the Normans. The external walls of the Roman fort were reconstructed about a century ago using the best knowledge at the time, and it is fair to evaluate this in this light, remembering how we do things today may well be deemed archaic in a hundred year's time. The keep is a fine remnant of the Norman castle, but note there are many steep steps to climb which may be too much for elder members of your party. The house is beautiful, and as it entertains visiting dignitaries from all over the world, can be forgiven for being tastefully ostentatious. The audio tour (voiced by newsreader Huw Edwards) was clear and very informative and allowed for adults and children to understand the history and development of the castle. The surprise feature was the Falconer with the collection of birds kept there, mainly owls and buzzards, with a passion that shone through, and despite the bitter cold we were entranced, as others who came and went were. It was a joy to see someone who so obviously loved his work and almost worth the entrance fee on its own. There is no limits on photography, which was welcome, though no flash is to be used in the house itself. We finished our visit with a meal at the favourably-priced cafe. All-in-all thoroughly recommended. It is overall limited for wheelchair access, that's typical of castle designs of course, but where possible it has been made easier with a lift in the visitor centre and shop areas.