The app interface is gorgeous, but the contents is dissapointing! At least for the Zion park wchih is the one i bought. It is only $1.99 which is not much, but i bought it becuase it claims to offer tips from National Geographic photographers + parks secrets. The tips from the featured photographer are nothing and the images dissapointing and uninspiring. The app lists the places you should visit but it does not support them with images, just descriptions. Coming from NG, this is disapointing! I certainly will not purchase any other guide.