When you arrive at the House of Bols the building looks grand and impressive, but the exhibition section is just a few rooms on the basement level. Admittedly the smell and taste interactive displays are fun and entertaining, but only expect to be entertained for about half an hour.
Having been to the Guinness factory in Dublin before I was hoping for...more? Maybe a few dummy cocktail bottles to practice your skills? Or a room on how to be a bartender?
I really enjoyed my cocktail at the end and the mirrored bar was good fun. Maybe try and catch a cocktail making session...saw it advertised.