Very grateful for the support re: check in process and collecting keys. I was on my own with two little kids in the car, and the person handing over the keys met me at the garage entrance, and they provided me the garage buzzer too (noting that the house manual says usually you need to go up to the apartment first once you have the keys to collect the garage buzzer - this would be painful if you had kids and on your own, unnecessary extra hassle, so it was great that the key handler helped with this - i suggest you request the same if you are traveling solo with kids).