It depends on what products you are looking at and what you want them for. Ninja (and other brands) have a lot of different options. What are you looking at? The woodfire oven? The Tabletop? Air fryer? Blender? Waffle maker? Juicer? Pressure cooker?
I have an Instant Pot. I hate the thing. I can make great rice in it, but I can do the same thing on the stove. I hate the meat texture I get out of it, no matter what the meat or what recipe I use. It's going in the garage sale pile, I think. Both my girls love theirs and use them regularly.
I have a Crockpot; a big one with the removable crock. I would like to get a smaller one, as using the one I have now means making a big batch of stuff, if I want it to cook properly. I'd still keep the big one (it's going strong after...jeez, 15 years) because it's perfect when we make chili....enough for dinner, lunch the next day, and 2+ meals to freeze. But I want a smaller one to cook smaller portions of roast or stew in, because I don't like freezing the cooked stewed veggies....the texture just gets worse. I'll make the space to have a second crockpot, maybe when I get rid of the instant pot.
I have a Ninja tabletop oven; it has air fry, toaster, baking/roasting, pizza, etc settings. I use it a lot..almost every day. So much easier to throw a frozen pizza in the tabletop oven; it heats in 5 minutes, cooks a Totinos in 11 minutes, and cools down in about 10-15 minutes....and doesn't heat the whole house! I don't like it as a toaster very much; but I do use it to warm buns for burgers/hot dogs, or for pitas for sandwiches. I air fry frozen veggies (you know those Birdseye or Green Giant ones that are roasted?) and frozen fries. I roast chicken parts and pork chops; and have made reversed seared ribeyes too. I also use it for baking. I bought smaller cupcake pans (6 per pan) that fit the oven; also have made baked donuts and Soberdough breads (in mini bread tins). This is one gadget I am not sure how I lived without!


I bought DD#2 a Ninja air fryer about 3 years ago, and she still loves it. She uses it most often for fries and nuggets, lol.
I have two fondue pots, that we use about every 3 or 4 months. The ones that have a metal pot to heat water in, and a removable crock to cook in. I bought 2 extra crocks, so we can do a cheese fondue, a meat oil and a veggie broth, and a chocolate fondue without having to wash the crocks between. Sometimes we do all 4, sometimes just dessert or cheese. It's a lot of work, but fun.
I've had a breadmaker, twice, and it worked for what I needed it for...fresh bread made while I was working. Got rid of it, and do it all by hand again, since I have the time. I have a Kitchenaid stand mixer and I love the thing; but I also have an amazing hand mixer (still going after 10 years) that could do the job if needed. I have an ice cream maker that we've used maybe 5 times; I'll hang onto it, because it's great to use on occasion, but I wouldn't buy it again...maybe get a Ninja Creami, haha.
My coffeemaker is a Ninja also; my kids got it for me last year for Christmas, and got that one because it was a good deal. Same with the one I bought DD#2 this year; got a good deal, but if another brand had similar reviews and a better price, they would have got that one.
My food processor is a Ninja...because I got it for a great price. It does the job I need it do just fine.
Also, all my pots/pans and knives are Ninja as well; got them on a really good sale at Sam's Club. Love them! My bakeware is Food Network, and it's fine for what I paid for them (got them super cheap at Kohls one day), but when they are done, I'll buy better. (I also have two sets of Henckels knives, but the good set needs serious sharpening, and the others were the cheap ones from Target, and have dulled enough that I need to get them sharpened as well.)