Yes I’ve used Davids and it was pretty easy. Each resort room costs DVC members a certain amount of “points” and you get charged by the point (about $19 to $24 per point).
So you pay a small deposit to make a booking request for the resort and room type you would like. They contact a DVC member to search for availability and let you know what’s available and the exact price. You complete the request and they ask the DVC member to make the booking for you and send you the details. Then when we did it you had to pay in full and it was non refundable. That was the only real disadvantage, paying in full nearly a year in advance. Disney is absolutely fine with members doing this, members can use their points in any way they see fit except for illegal of dangerous activities of course.
But I believe things have changed. DVC Rental Store allows you to pay a 25% deposit upon confirmation of your reservation with the remaining 75% is due 75 days before your trip. Both now also have cancellation policies in place so you can cancel but you still need to do so about 4 months ahead to get a full refund and the refund reduces from there.
It’s a great way to experience Disney Deluxe for a lot less but with this new flexibility the prices have increased. So have prices for all Disney hotels I guess