I love to cook and have always been a solidly competent cook, so I was surprised that this little oven could expand my kitchen skills as much as it has! I have made some of the BEST dinners in this little oven - air fried pork chops (PERFECT!), baked salmon (chefs kiss; so good!), chicken, potatoes, etc. Things that I thought I've always made well are now easier & often BETTER in this oven. And it doesn't heat up my whole kitchen & is super easy to clean up. Oh, and I had a similar Breville oven that this one replaced - and I'm a little salty about that"¦.this oven is about half the price that I paid for the other one and MUCH better!
I know other reviewers don't like the quiet beeps that it makes - I LOVE that it's quieter. I also downloaded the app & like that I can manage it with the app. It would have been nice for them to have better labeled how to power it off (press & hold the time button), but I just marked mine with red sharpie so people know that's also the power-off button.
All in all, a great oven at a great price that is reliably multifunctional!

For context, I am a former professional line cook and currently provide dining services :) to my family on a daily basis.

I was looking to replace a dead 4 qt. air fryer but wanted a multi-function unit for the following reasons: 1) my home oven takes ~17 minutes to preheat to 350F, 2) currently lack convenience of a toaster oven 3) I have limited counter space.

I have had this Cosari 12 in 1 for less than a week but have used it every day. Here is what I've done and the associated experience/results:

1) Air fryer function: frozen chicken nuggets + frozen crinkle cut fries - the unit was to temp (360F) within 2 minutes. Loaded the fryer tray with both nuggets and fries. 9 min cook time. Everything came out evenly browned and crisp. The unit was also surprisingly quiet. Much quieter than my last unit. Score- Air Fry - 10.

2) Convection Bake function: Re-heated pre-cooked thick cut bacon. I pre-cook and keep thick cut bacon in the fridge at all times. Normally, I would re-heat via microwave (soggy) or on a cast iron skillet. I slid 4 slices into the Cosari, set to bake 400F with fan (convection). WIthin 2 minutes, the bacon was sizzling and crisped up in more than half the time vs the cast iron. Score - convection - 10.

3) Bake function: Re-heated slices of both thin crust and thick crust pizza. I make tradional NY style thin crust as well as a thicker sheet pan style pie. Left overs are frozen and pulled for a quick after school (or late night!) snack. Previously, I would preheat the oven to 375F and the slices would take 8-10 minutes to be hot and ready. In the Cosari, I set it to Bake at 400F. Preheated for the amount of time it took to pull the slices and arrange on a parchment lined pan. Maybe 2 minutes. Bake time was 8 minutes to perfection. I really think the limited interior space vs a conventional oven allows a higher concentration of heat enabling a faster cook from frozen. Maybe not, don't really know. What I do know, I give the Cosari another score of 10 for this baking application.

4) Warming function: I have previously used my standard oven for holding foods hot when hosting and serving larger groups. I was preparing a breakfast taco bar for 10ppl and decided to try the Cosari to hold hot foods hot. I set the warming function at 220F and loaded in cold cooked bacon, pan fried breakfast potatoes and a pan of scrambled eggs. This gave me the time to warm tortillas on the cast iron skillet, lay out the spread of cold toppings and call everyone to the kitchen. I pulled everything out of the Cosari after about 10 mins and everything was perfect. Super convenient and effective. Warming function score: 10.

5) Broil function: On occasion we treat ourselves with buttered texas toast with cinnamon and sugar bruleed under the broiler. Popped a couple of slices into the Cosari, broil setting on 400F for 2 minutes. Being able to turn the light on without opening the door is a great feature to guard against burning the sugary sweet treat. Perfection. Broil function: 10.

I have yet to use the dehydration function but plan to with some near end of life bananas. I also have yet to use it to bake (or convection bake) or roast a substantial amount of meat.

Overall Pros: My expectations were met and exceeded in some areas with this unit. It looks good and comes with the necessary rack, broiler pan and air fryer tray. Note: 2, standard 1/8 aluminum sheet pans fit perfectly on the included broiler pan which is very handy. A 12" pizza round also fits inside perfectly. Super versatile unit & highly efficient. The control panel is easy to use. Also, the chime is not overbearingly loud or annoying.

Overall Cons: The control knob on my unit feels loose. It turn with incremental notches that can be felt though the function and temp displays aren't sync'd with the notches. In other words, the going from 350F to 355F is halfway between two notches. Weird. It may have been put on incorrectly. I hope it lasts. Also, the door which drops down is spring loaded assisted to close. It is quite tight and has slipped out of my hand a couple of times slamming shut. I don't think that will help the longevity so something to take notice of and avoid letting the door slam shut. I will say, the handle is perfectly positioned whereas then the door is open, the handle serves to keep the open lid at a 90 degree angle allowing for the opened door to serve as a temporary landing shelf.

If the rating system allowed, I would rate this a 4.5. I can't give it a five because of the knob issue though so far, I love this unit. My wife refers to it as my new little friend.

I hope this review is helpful.

Product is great but delivery was delayed and came damaged also was a hassle returning
Sucks to lose a star because of the delivery
Recommend the air fryer though 100%

Needed to replace a toaster and was intrigued with an appliance that could do the job of several. One challenge was to find one big enough to roast a chicken or bake a casserole yet small enough to fit under the cabinets. This Cosori definitely fills all those check boxes and more. So far have used toast, bake, rotisserie, and air fryer. Have noticed that times and/or temps may have to be adjusted for certain things but it's not a big issue. The only "negative " is the length of time it takes to toast, but it does seem to toast evenly. Looking forward to trying the dehydrate feature.
Cleaning is a bit of a challenge, but found it helps to use aluminum foil on the bottom tray and wiping down the glass door after using air fryer or rotisserie (obviously after it cools down 😉).
As for the durability-looking forward to having this for many years.

So far we have used the Broil, air fry, and keep warm. Do not know if i will use the other functions as we have other things in the kitchen that do the same function but on a larger scale. Will say im interested on the ferment option and being able to cook a pizza. But we do not eat enough pizza that we have used it yet.

The Good:
The amount of things you will be able to fit while air frying is amazing. We had other air fryers in the past and this one cooks almost everything we need at one time. Very easy to clean the interior and exterior of the unit as it does not have to many parts to take apart to clean. I love the keep warm part it keeps things warm if cooking does not go to plan.

The not so good:
The fry basket is a little hard to clean due to the grate pattern. The racks/ Fry basket do not stay in the oven so you are able to take items out of them with out fully taking them out. I ended up putting foil on top of the oven going to have to find something else to keep the top clean from putting the racks there. Unit is taller then most other air fryers we have used.

Over all with the good and not so good we are enjoying it and have been able to get rid of the toaster oven and air fryer. Now we have more counter space . We are very happy with the purchase