Having bought a Ninja 9-in-1 some months back, I always struggled with it's shape. After a friend bought this Russell Hobbs Satisfry, I could see how much more practical the shape is, so bought one myself.  I can fit in 2 x 2lb loaf tins for cake making, 2x 2 slices of bread of toasties, and can do a batch of chips in nearly a single layer, to name but a few advantages over other air fryers.  I can bake, roast, grill, air fry and slow cook. I really haven't looked back and my Ninja has been passed onto my son for use in his touring caravan.