One major improvement for me would be if I could set up Length of Stay discounts for Booking.com
OR documentation indicates this is not possible, but when looking at Booking.com's Promotion API documentation it looks (to me, not a techie), that it should be possible.
OwnerRez doesn't currently create promotions in booking.com as their schema is quite different and more limited than the discount structure in OwnerRez.
Instead, create a promotion or derived rate on the booking.com side, based on the normal nightly rate that OwnerRez is pushing. Then the promotion will be applied to bookings if applicable.