The gardens are lovely, and the sculptures beautiful. The café is fantastic, serving lunch and dinner what seems to be all year round! The staff are extremely friendly and helpful, and the little gift / craft shop is lovely. They also have a little outdoor shop selling pots and plants (not open when I was there on Boxing Day). We were there on a blustery, cold, Boxing Day. I can only imagine how wonderful it would be in the height of summer.
We visited the sculpture gardens on an incredibly windy day in November and had an enjoyable few hours exploring and taking in the art and the views. Then had an absolutely stunning meal in the Tremenheere Kitchen, the vegetarian offering was fabulous! We then topped off the day with a hot chocolate in the fresh air under the canopy. I can highly recommend a visit.