OK, this may be premature. I just got my Presto 4-Qt pressure cooker today. I washed it, dried it, then immediately put it to the test. I had some posole corn grains to cook (which had been soaked overnight already). Following the booklet's instructions, I added enough water to cover the posole by an inch. Put the lid on securely (having checked the pressure vents and seal all around), then placed it on the burner on high heat. After about 10 min, steam started to GUSH from the handle area, top (under the rocker) and even the sides a bit. Twenty minutes later, even MORE steam. The inset pressure valve had long since raised up and locked into place. So what gives? That rocker simply NEVER EVER started to jiggle. I stopped. Let the pressure cooker cool, removed lid, re-checked the insides and all valves, then fired it up again. Same story. FORTY minutes of steam gushing from the sides and near handles later (and rocker still as a corpse), I stopped. Cooled it down. Did the whole thing a THIRD time. Again, 20 min later, NO rocking motion whatsoever coming from the top. It appears that all pressure valves are doing what they should. The handles fit together nicely, and the lid is definitely locked in place (assuming the gasket is also where it should be). Complete puzzle. Very frustrating. I suppose I'll have to return it, but even as I peck out this review, I *know* I am going to try this ONE more time. My mom has a Miromatic pressure cooker about 25 yrs old that this Presto was supposed to replace. Uh, NOT.