Ninja
Foodi Dual Zone Series
Dual zones for smart cooking, but baskets are small.

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toaster over + air fryer combo I really like the ninja sp351, bought it 2-2.5 years ago and it’s holding up well. Toasts, air frys, and the griddle works pretty great to cook in for quick meals / reheating / roasting ingredients while the main over is busy Unless you cook a lot of premade frozen food, that’ll be far more useful than a microwave
A combo unit, like [13-in-1 Ninja appliance air fries, sears, bakes with 75% less fat than deep frying, fast and versatile healthy cooking](https://a.co/d/gWhBCZL). If you can only have two, I recommend something like this and a microwave. If only one, honestly I think this is more versatile than a microwave and makes better food in general. This is the model my parents have, not sure if there is something else out there more suited to your needs but I've done a lot of different meals in this thing (toasting, reheating, searing, oven, air frying, etc) and to my knowledge it truly does work well at the different cooking types it claims (again have tested/tried everything, just the more normal stuff and have enjoyed using it). The benefit of this particular one is that it has a pivot stand, so you can fold it up out of the way when not in use to reclaim some of your counter space. My dad likes to leave it up and I like to leave it down cuz I constantly have to clear clutter away to fold it down. I've compared making roasted vegetables in the oven and in this machine and I tend to prefer this machine over the oven. Plus if you're cooking for only one or two, the size is about right for it and not too hard to clean (unlike having to try to clean the whole glass stove stop, not hard just a lot more surface area). I don't mean for this to sound like an ad, like I said this is the one I have and I like it. There are likely other versions of this same style (a combo unit designed to be multiple machines in one). Likely a good version of each machine would perform better in its specific category, but a combo unit like this achieves I think 90% of the same result or sometimes better in rare cases, but has the benefit of less room being taken up since it's one machine, and it can be folded up for more counter space. When I get my own place, I am planning to either get myself this one, or look at what is available and try to find something even better if it's an option, and won't worry about other appliances until I actually need them (cuz this does pretty well by itself).
Look at the Ninja Crispi Pro models that have glassware baskets. They are pretty good. Much easier to clean and you open them up less to check the food because you actually see your food. I have one and like it more than my other model Ninja that is a 9 or 12-in1 thing
I have the Ninja 12-in-one. I use the regular oven when whatever I’m cooking is too big for the ninja.
Any air fryer is a “convection cooker.” The “air fryer” name is a sales gimmick. Just like the “instant pot” label is a gimmick for a pressure cooker. I have owned a Breville Smart Oven for several years and would buy another one. I also have a Ninja upright in my second home. I like the Breville better, but the Ninja is fine. I cook a lot. I have a high end stove with a convection oven. If it were me, I would keep it. The Breville does everything that your toaster oven does, but better and faster. It also can roast and bake without having to use your regular convection oven. Of all the countertop “convection” ovens, it is probably the best. This was a very thoughtful gift from your relatives. As far as cooking with it, we love chicken wings. The Breville cooks the best chicken wings fairly fast and better than a regular convection oven and roasts vegetables beautifully. (Probably because of the smaller cubic area.) Also reheating on the Air Fryer mode is a game changer, much better than your microwave. To use it well, you do need to familiarize yourself on how it works. Watch some YouTube videos where the Breville is used. Read the instructions so you can learn how to use the various modes. Familiarize yourself with it before making a decision to return it and by all means, go ahead and treat yourself to a carbon steel wok as well. It is not an either or proposition. You deserve both!
Air fryer was my introduction to teaching myself how to cook. Started off with simple recipes and later progressed to recipes with more components. Do you -need- an air fryer? No, but I definitely prefer using the air fryer over the microwave for heating up certain foods. I've used the air fryer to warm up pretzels, pizza, baked items, etc. But if you are going to pick up an air fryer, pick up the one with the bigger tray. I got the Ninja air fryer with the thermometer attachment. This lets me get food to a specific temperature. Was great when I didn't know what the heck I was doing. I'd put the thermometer into chicken, porkchops, steaks, etc. Then as I became more comfortable I needed the thermometer less and less. So, yeah, I think it's a good investment.
Ninja
Foodi Dual Zone Series
Dual zones for smart cooking, but baskets are small.

COSORI
Turbo Blaze 9-in-1 6QT
Quiet, easy to clean, but lacks a viewing window.

Ninja
Foodi Air Fry Oven Series
Flips up to save space, but shallow and air fries poorly.

Breville
Smart Oven Air Fryer Series
Oven replacement; spacious, but air frying and cleaning divide users.

Typhur
Dome
Self-cleaning and quiet, but expensive with shallow interior.

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Breville - Smart Oven Air Fryer Series

Ranked #1
COSORI - Turbo Blaze 9-in-1 6QT

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Ninja - Foodi Air Fry Oven Series