I have the Instant Pot. There is an Instant Pot community on FaceBook if you are into that sort of thing. Mine holds 6quarts. There are 7 quart and 8 quart Instant Pot sizes. It does take a few minutes to come up to pressure. Something frozen would take longer. My baked potatoes took 8 minutes to come to pressure. I set it at 13 min. but they were big potatoes and I think 20 would have been better. And then I came back later when we were ready to eat. I know I could make them in the oven, but, I am enjoying the Instant Pot. For us it makes the best rice, better than the rice cooker and I gave up stovetop a long time ago. too much watching. Apparently if something is amiss inside, it shuts itself off, instead of exploding!!
http://instantpot.com