We were in town for my cousins wedding and had a little trouble with the key exchange process. Check-in was after the start of the wedding and to get the key we needed to meet with the host. This became a hassle quickly and I think finding a way for guests to access the apt. Without needing to coordinate meeting would really help. We ended up racing over between the wedding and reception but were a bit earlier than we predicted and couldn't get ahold of anyone so ended up having to go back to the reception late and without the key still.