First off, the only reason this app gets a decent score is because its pretty cool having access to a compiler on the iPad. I say access because the app sends your code to a remote server to do the compiling. As you would guess this can be kind of slow. Nonetheless, the real gripes are with the code editor itself. The lack of being able to select and copy large chunks of code, or even delete large selections is a pretty big oversight. As a result Im mostly coding in the ipad notes app then copying to the editor. This slows me down further and also results in bad syntax errors due to the tendency for the notes app to add capitalizations where I dont what them. You are also very limited in the type of code you can run. The editor only gives you access to the basic system namespace, and there are a few strange limitations with having to declare basic methods as static. But it is good to be able to test code for reference.
Ang&Steve about C# Programming Language, v3.3