Awful experience, no one should book with this company it’s an absolute scam. Our tickets were turned down at the Moco museum as they had not been not ‘redeemed’ we were told we had to go all the way in to central Amsterdam to the Tickets and Tours office to redeem them, when we got there they also could not ‘redeem’ our tickets. I phoned the number on the app and was told this number was not actually for Viator. Overall a really disappointing experience