I'm not going to spoil it. However, I just picked up the adventure to prep for this weekend. I read through it last night and I think it is pretty amazing, especially for a "demo" adventure.
Honestly, it makes the first demo look pretty lackluster. That's not to say that was a bad demo adventure at all, it did what it needed to and was fun ...
No, really, it is because this is a FULL adventure, with lots of backstory, several chances for fights as well as several social interactions, all with good detail for the GM. Fret not, though, FFG gives GMs tips in the adventure on places to cut or skip should time be getting low. Excellent!
If you haven't signed up or planned to attend this demo ... DO SO! It should really rock! (get it? dwarfs... rock... )