I used another air fryer without the window and it seemed like it cooks the food a little faster and better with the air fryers that look kind of like a rice cooker.  I think it's because it may circulate the air better?  I'm not sure.  But I like this one because it has a window and you can see your food cook.   It also looks better than the rice cooker looking ones on my countertop. I. also like how it can go up to 450F and has different cooking options other than just the air fryer.