We agree on those points, however. It's a big pain in the backside that they don't document their API better. And many of the classes, like TTPhotoViewControlle

We agree on those points, however. It's a big pain in the backside that they don't document their API better. And many of the classes, like TTPhotoViewController and TTScrollView, have some big problems that require modification to overcome. But besides being a free library, I used three20 in many of my recent apps because I have been working with publishers to build navigation-based apps that require things like image caching and URL navigation. A number of other features of three20 are quite welcome, despite their quirks. I usually try to do a quick test of the framework before I integrate it into a project and guarantee that it will work, because, you're right, some of them don't behave as advertised. This is even the case with some of Apple's libraries, but I daresay their documentation is better than three20's.