The thing I like most about this app is the ability to immerse myself in all sort of things about the park through the podcasts, videos and photos (as well as the texts, of course). I love the National Parks but I cant always get there - especially in this economy. Also, I have an iPod Touch rather than iPhone and still I can thoroughly enjoy a "virtual" park visit. This is great for me. I cannot wait to see other parks as they get added. A visit to a lovely National Park 1000 miles away for $5.00. Cant beat it!