This set will be and is already a classic LEGO castle set. This set contains every elements that surprises you:

a) The theme is great - this is the first ever mining set for castle
b) Design of the set is cool - cool door, cart and track, and the rest of the mining system
c) Lots of new LEGO mini-figures - helmets, dwarves beard, and trolls are all new
d) No stickers: everything is printed.