There are a lot of issues with this site:
1) once you add notes to a reservation, they cannot be edited or removed (people do cancel!)
2) once you highlight a date, it stay highlighted forever
3) crossing out dates on calendar is not helpful, I cannot see where I have a check in/check out, it's just all crossed off --unless of course it's an airbnb booking
4) I have a minimum of 3 nights stay, but b/c airbnb crosses off unbookable dates, I cannot tell if I have a booking or if it's crossed off b/c 2 or less days. this impacts my ability to offer a 2-night promo or go myself to check on things
there are more, but this is a good start!