I am a Ninja fan and have, or have had the majority of their products. I also tend to research their products before I buy them in an effort to avoid duplication of functionality. I did buy the Ninja Speedi thinking it would be nice to cook a couple of foods at one time. I did use the Speedi a couple of times. Once to steam and crisp a whole chicken and once to air fry French fries. Both came out very well. The problem I had with the Speedi was that cooking two foods required one to be below the other and there was no way to monitor each food being cooked, and there was too much trial and error.This Combi oven is basically an upgraded Speedi cooker that is much more versatile and, in my opinion, easier to use. It has the same functions and settings as the Speedi, but the ability to open a door on the front presents a whole new world of possibilities. I have used this cooker a few times since I got it and have not yet explored all the possibilities.So, what do I love about this cooker/oven.1) It opens from the front and has a window to view food as it cooks.2) The steam and crisp function should be called a steam and brown function. I have used this function to reheat meats, such as leftover roast, chicken, etc. that had been frozen and thawed. The steam keeps the meat moist, and an external thermometer keep it from being over cooked.3) It works great as an air fryer as did the Speedi.4) The steam and crisp works as well as my more expensive Anova oven to cook leftover meats and for fish filets. For this, I use a Meater thermometer to monitor internal temperature. The steam and crisp also works well for refreshing stale bread and rolls, especially French bread. The result is a soft inside and a crispy crust.5) This oven is large enough to cook a 5 lb. chicken using the steam and crisp. For this purpose, an external thermometer should be used as the suggested times in the manual tend to overcook the chicken.6) Other than taking 7 minutes to build steam for the steam and crisp function, this oven does not require preheating.7) What I have cooked in this oven so far is done surprisingly faster than in my other ovens.8) The ability to reheat proteins, full meals, and casseroles without drying them out or changing the texture of the food is worth it's weight in gold.As with most new cooking appliances, there is a learning curve. Getting recipe ideas from the provided recipe book is a good way to get familiar with the capabilities of the Combi Oven. It should also be noted that recipes for the Speedi will work as well in this oven. Once you become familiar with this oven, it becomes easier to plan your own dual level meals. For the dual level meals that cook rice or pasta in the bottom pan, you still need to use a different bowl for serving. I sometimes use Rica-a-Roni or Knorr pasta sides that I can cook in the microwave in the serving bowl and not dirty another pan.Overall, I very much like this cooker over the Speedi and would recommend it if it supplies the functions you need. I will update this review if my opinion changes, and hope this review was helpful for you.