I know a couple of folks who got one last year and love them. Seems for the time savings element more than anything else. One person says it produces food 'just as tasty' as a slow cooker but in less time. Another said it means she doesn't have to keep stirring or checking the pot on something requiring hours. And, again, in a much shorter time span. The negatives I read had to do with the fact that if you want crunch, this appliance won't provide it.
Here's the thing, however; I love the stirring and watching and assessing that goes into cooking. Even when using a slow cooker, I'll lift the lid occasionally, taste and adjust flavors. Add a pinch of salt or a dash of herbs. For me cooking is a participatory sport. An art form that requires attention. But then I don't cook for convenience. When I make a stew I like participating in the process from the mise en place during prep, to the adjustments of taste and temperature, to the serving and enjoying. Don't get me wrong, I love convenience as much as anyone else. Yes, I do buy "bagged" salads. Especially those that have a mixture that includes kale and spinach and carrots and broccoli and cabbage. I buy them because the ingredients are already chopped up. However, I still sort through it discarding anything not up to my standards and then I still add other stuff. I'll add chopped apples, raisins, sunflower seeds and chopped hard-boiled egg. And grated cheese. Maybe even a handful of sauteed shrimp. Hmmm, is it lunchtime yet?