This app is amazing in many ways. It is easy to use and very intuitive. It is easy to export pictures with just the peaks you want labeled. It is really fun use while hiking and I have used extensively on numerous hikes in the NE Appalachian mountains with no difficulty. I was excited to use the app on an upcoming trip to Thailand and Laos. I downloaded the area before the left, but every time I use the app in this region it tells me there is a better region to use, despite being in the middle of the region I downloaded. So I tried to download this data, using a good WiFi connection and every time at 30mb I get an error message and it does finish. I have 1.5gb available on my older model iPhone. A more specific error message and the ability to resume interrupted downloads would be excellent features. Also the region I downloaded has very few of the prominent mountains and hills labeled despite my father in law knowing the names of them. This would be a five star for use in the states, but was a little disappointed that it did not work as well in Thailand and Laos. Every hiker should check this app out though. It is super fun and all my hiking buddies have purchased the app after using mine on hikes.