We got here late (they close at 5) but were able to see some of it. Definitley take the tour of the windmill, it was fun learning about how it works, my kids were very interested. There is a lot of stair climbing but well worth it.
I wish there was more to the gardens as I dabble in photography, and the shops looked really neat but we didn't get a chance to check them out.
Overall it was a good visit!