"Wow". No other three letters could describe Master Quest any better.
It has even better atmosphere than the original campaign. Some rooms are truly astonishing, especially the very last "room". Those gave me goosebumps. But that's not the only thing that gave me the chills; what I didn't like was that it had spiders where there weren't any in the original campaign...

This was imported Toorum on hard. At first I thought this is going to be my last LoG run (at least for now), but this was so awesome that I'm thinking about creating a fresh 4 man party and do it again...