Booked the Auschwitz tour 2 days ahead, all confirmed. Picked up on time. Then we got there, they couldn't get us tickets to get in. So essentially we just went for a ride to Oswiecim and back to Katowice, a real waste of time. Needless to say we were refunded and the tour leader was apologetic, but I expect a tour company to be able to get the basics right and be aware of up-to-date Covid ticket limits.