When you "rent points", you are not making a reservation with Disney. A DVC member makes a reservation using their points for a DVC villa. So the agreement is between you and the member. So nothing that goes along with a regular Disney reservation will be in play. No PINS, no discounts, no deals, no free dining, etc. And, the big one, more than likely, no cancellations or changes to the reservation. Meaning no refunds.
Until you check into your villa, you don't even own the reservation. It is owned by the member. So you can't make requests yourself or add the dining plan or Magical Express. The member has to make any requests for you.
Plus, unless you pay extra, no daily housekeeping. For stays of seven nights or less, you get your towels replaced and the trash removed on day 4 of your stay. If you stay eight nights or more, you get one full cleaning on day 4 and trash and towel service on day 8. If you need more towels, more shampoo, more cleaning, bed making, you have to pay extra for that.
But you are treated like any other Disney resort guest once you check in. Like access to Extra Magic Hours, use of Magical Express, etc.