They're definitely quicker than your oven. They are heating a much smaller space and you can get some amazing results. Yes, I've got 6 grandchildren, so any frozen oven chips, chicken nuggets and variations on that all come out better. Baked potatoes are great. Start them off in the microwave and finish them in the Ninja. Superb! I've tried the dehydrate so far on fruit. Strawberries and bananas and I've also done some marinated salmon. All taste great. Not got around to doing any meat yet.
Through the years, there's been a succession of fads to clutter up your kitchen worktops, but this is one that is actually useful! The toastie maker, George Foreman grill and various whiz-up-your-fruit machines are all in the shed. But I can see this one lasting. Mainly because it's so versatile.