Not the best value for money experience. In fairne...

Not the best value for money experience. In fairness we perhaps never allowed sufficient time to experience the attraction fully, trying to cram so much into a busy weekend schedule. However, that being said - the attraction entry is expensive and thus the audio commentary should be included in this price not a separate chargeable entity. Many like us, may not have the time for the guided tour or want to trail around as part of a large crowd and the option for the audio commentary should be available as part of the entry price.
If not part of a guided tour due to time restraints, it is difficult to ascertain a route or advised direction of where to start the experience and so people often wander aimlessly around and the attraction perhaps does not make as much sense as it could.