How long did it take you to get it?

It's taking me a while, but I like playing through the game and absorbing all the details throughout the thing. 

Right now, I'm on the last Oyster.  It's driving me crazy because I'm going to have to go through all fifty locations again cuz I know I forgot one and I've already been there.  Oh well...

I did get all fifty Horseshoes and finished five more missions so it was a productive weekend.