I was there a few weeks ago and enjoyed it. Many of the images were more 'mainstream' IMHO, although I was not overly impressed with the winner. Some images were very moving and shows what complete and utter barstewards humans can be. If you go at teh weekend you better book in adavnce unless you are a member as they do limit teh number of tickets each day.
We visited last week. Some great images but not that many IMO. Agreed that the winner was less than impressive.
The leopard shot by the 15 year old was excellent.
My favourite was the series winner, insects in fantastic close up, clarity and colour.
Worth booking in advance.