They came out great! Very creamy, soft, mashed potato texture.
I couldn't wait, ate one right out of the pot. I don't recommend it.
I did this:
1. Pour 4 cups tepid water in your pot.
2. Dissolve 1 cup fine table salt in 2 cups very hot water, add to the instant pot.
3. No trivet needed. Add 5 pound bag salt potatoes from Walmart (they were a bit smaller than a tennis ball)
4. Set 3 minutes manual setting, 17 minutes natural release, then pulse the remaining pressure out. Drain and serve with melted butter.
Serve whole or cut in half and mash.