Well it seems my review is going against the trend but here goes.
It is very intense and has discomforting themes, but that's the play. All the cast are excellent in their parts and the set is perfect and very evocative with the small sound effects and fog .
It's in two parts ,the day/afternoon, interval then evening/ night .
An actual classic play with a great cast and one superstar with reasonably priced tickets , we thought it was brilliant.