I can't stand Inform 7. I tried it when it first came out. Seemed like a huge breakthrough but sheer level of pointless verbosity really made it inviable for me. For example, the last thing I tried doing was adding an extension. When you include it you have to type out the full name and even "by ". One of the many wastes of time!
This was a long time ago when it first came out, I can not speak for it now. Is it any better?