"Free rental" for reaching the next level.
Never again, and here's why:
-1 it's only good for your first session with it- if you leave and come back, even if you're within the allotted rental period, you cannot re-equip the free rental. Even when it asks you- "would you like to equip your free rental?" Complete and total fail.
-2 I just played a round, no more than three hours from adding a '24 hour' free rental to my equipment, and the game kicked me off, told me my free rental time was up and left me to finish with no driver.
Never again- keep those free rentals.