Hi,
Another old guy back in to lego after a looooooooooong time, 36 years old and counting :-). Just bought the grand emporium and now building this together with my 7 year old son (since I got to play with his lego sets, only fair :-)). I can highly recommend this set, its pretty big so you can spread it out a bit, so every night an hour before bed time we build a piece of this set.
Take care.
J.