I visited this WHS in August 2015. Its proximity to Vienna's Historic Centre and the fact that it includes one of the world's oldest zoos mean that it attracts huge hoards of tourists and families. Luckily its gardens are truly immense so it still can be visited at leisure without being constantly in the presence of groups. That said, after my nightmare experiences visiting the interior of other WHS palaces such as Versailles, I decided not to go in the palace. Instead I bought tickets for the private gardens and the Gloriette terrace. The gardens are kept in tip top condition however it's a shame that for every structure/section present you have to fork out money. There is a fee charged to visit the palm house or the cacti collection which is really too much and not value for moneyt when compared to other gardens on the list such as Kew Gardens. The highlight of my visit was the panoramic view of the palace with Vienna's historic centre in the background from on top of the Gloriette terrace. I was glad to pay 3.50 euro here to enjoy the view in some peace and quiet. All in all, I'm glad I visited Schonbrunn but to say the truth I felt it has become too much of a tourist trap (the neverending queue of people each paying 50cents to go to the toilet at the entrance, when there are free toilets a couple of metres further on next to the palace interior entrance speaks for itself!) and I think I would prefer to visit the Belvedere Palace should I visit Vienna again in the near future.