This is first of all, absolutely huge - do not underestimate that. But at the same time, if you need that size, either because you have a large family, or because you want to put pizza in it and do not have a pizza oven, it is the second best thing you can get for that. It is pretty much all you need, taken with a mini-cooker, and microwave to cover the whole cooking facility of a large household.
Now I am into gadgets and cooking is like a big thing for me. Since I am not exactly good at it (according to my sister at least), this is definitely an alternative way to impress people without actually putting much effort into it. This is both as it makes it far easier for you to time the coming together of meals (everything there on time). And as it is very easily (given it is countertop level use, for most) to actually see the meal burni...I mean, cooking, visually through the window of the device.
Putting aside what it is second best at, it is absolutely fantastic as an item for anyone who needs to replace a whole range of kitchen appliances, with the versatility of the air fryer at the heart of it, the facility to take into it pretty large pizza (yes, that is a theme), and the rotisserie function, which feels almost like you're in a restaurant.
NOTE: I am only able to comment on residential/domestic use of this thing, but I can see it as being very useful for a bunch of like-dieted students to share chores in a household, and for everyone to enjoy the ease of cooking and cleaning. It seems ideal to put into a house syndicate fund for. I would say, however, that if it is just you and a partner, or even you and a youngish child, this is likely way too big for you. With my immense family, we can cover basically the whole household, and then it is just what get steamed and boiled that needs doing outside of that. Probably good as one out of several for a small sized restaurant, but that is speculative. I do not own and actually have never had the joy of working in one.
The only thing that you might feel is lacking is a hob space on top. This is something I have always wondered why these things (the bigger ones do not). This is something I presume you would have on a mini-cooker or at home anyway though, allowing you to do the kind of tasks that (whilst air fryers tend to claim they can do, like baking) do not, in fact, measure up on. But for many, I think that this alone this will expand the diversity of cook-at-home meals for many people with its ease of use and, for those who have large families, justify a beast of this size.
In terms of value for money, this is a tough one in some ways, in others not. I can see this as very appealing at the price to those who think wow, it does it all. But I think you would probably, giving it a little thought, realise that you can do better getting a smaller thing and keeping the change for other things. But when you look at even the best of the other competitors to this, for a device of this size, but one that (I certainly now consider one of the quality range, as per my title), I cannot see any that compare.
Happily recommend it - to those that have a place to put it and the need for something of this scale.