Do it and don't hesitate. I have done it a few times though David's without issue. I would recommend David's to anyone looking to rent out.
Be flexible on your points that you are renting. If you only want to rent one one year of points, all your points may not get rented. But if you are willing to borrow 10 or 20 points from the next year, all the points you want rented should go.
You will need to be ready to make the reservation when asked. An email will go out to a few renters, the first to respond will get selected.
You may be asked at a later to date to make changes or add things like Magical Express.
David's is a Canadian company and does not provide 1099's for your taxes. You will have to track and report the transaction your self when you file your taxes, if you are in the US.