Our old air fryer died after 5 years of use so it was time for a new one and the Ninja Double Stack seemed like the perfect replacement. My wife wanted something larger without taking much more counter space than her old one. The new Ninja is about 40% larger and the fact that it can make up to 4 different foods simultaneously @ 2 different temperatures is really nice. We've used it several times now & it works great. It's quieter than our old one and cleaning it is much easier. For those of you who can't find the actual measurements of the 2 cooking tubs, the measurements are 7 1/8" wide X 8 3/8" deep X 4" high. The 4" is with the crisper plate installed. We couldn't find that info anywhere including customer service, so here it is. There will be a learning curve for cooking with the racks and the different cooking times & temps compared to the old air fryer, but overall we give the Ninja DoubleStack a 2 thumbs up.