"I also have issues with all the stickers. Mainly that the ones for the long mat dont match up. Also there is a colour issue in my instruction book that says to use a dark red brick when it should be a brown one.The app is fun to use, but if this is the reason the set is pricey compared to the castle I dont think it is value for money. Also you cant use the battery pack to power any lights. Other than that it looks great with the castle."