I did this tour in 2019. This was really good, the tour goes through a lot of various areas of the airport, not just check-in, gates and baggage hall (which is quite special, it was used in a well known movie) but also more rooms at various levels, including one just under the roof which contains pictures and models. You go on the tarmac if it is free this day. The guide was knowledgeable and the tour is packed. There are times to take pictures quickly but no time to set up something nice with tripod.