It works well and is extremely useful in the 3 iPad apps CodeToGo, C Language and Coder. At the moment, as I mentioned in my email to you, I'm having to enter and edit text in Textastic and  repeatedly copy and paste it into one of these apps in order to compile it, over and over again with every little change. This is very tedious, as I'm sure you can imagine. I  Hope you change your mind about it not being a really useful feature. I don't know why it didn't work well for you but, from within those apps which I mentioned, it has always worked very well for me.

Best, Lachlan