This apartment is through a management agency, so you are dealing with them instead of the owner. Lockbox is mentioned in the listing, and it is a little way from the apartment. I enquired about the place before booking and had to answer a load of questions about why I wanted to book and my intentions, and agreeing to abide by the 'house rules' before the booking was accepted. I then had to fill out ANOTHER form on the management agency website to effectively agree to all of this again.
To me this seemed a bit unnecessary, given that AirBnb have all my details, and you have to agree to the terms on their website first. I've never come across this with a booking before and detracted from booking the place. I don't think I would book this apartment again based on all the hoops you have to jump through.
That aside, the apartment itself is nice and in a great location.