Instant Pot Duo Crisp + Air Fryer 11-in-1 Multicooker, 8L - £149 @ Amazon

This a good review: "I bought my Ninja Foodie OP300 about a year ago. It sits in my holiday home and is fantastic. Guests love it. So I wanted something similar for the main home. The other name in this market is this Instant Pot. At full price they both come in around £180 but both have highly volatile fluctuations. I watched both and the Instant Pot dropped to £119 so I went for it.

By default I use air frying more than anything else so they normally live with that lid attached.

Both are bigger and heavier than you imagine. I would say the Ninja is wider and the IP is taller. The Ninja lid pivots left so you need even more counter space. The IP lid lifts off so you need somewhere to put it when hot but where is up to you. The pressure cook lid on the IP is smaller and easier to store than The Ninja one.

The basic pots theoretically are the same 5.7 litres. But the Ninja is wider but less deep. That makes it more flexible for accommodating cooking dishes. I can get an 8" cake tin into the IP pot but I can't get it out easily when hot. I burned myself on the pot on its first outing which has never happened with the Ninja. For cooking direct in the pot, e.g a slow cook, there's no difference.

For cooking in the inner air frying basket the Ninja is noticeably bigger. Food spreads out more so cooks more evenly. The IP is deeper and has an insert so you can split the food. I suspect you can cook the same amount of food but in a double decker arrangement in the IP.

Clean-up. The Ninja had a ceramic non-stick coating on the main pot. Nothing had stuck in a year of use - magic. The IP is stainless steel. Keeping it as shiny and scratch free as new is going to be impossible.

When it comes to controls they are both pretty easy to use. The Ninja seems to be slightly better quality. The IP has finer control over temperature and more modes but honestly I'm not going to use much other than fry, bake, slow cook, pressure cook.

The instructions are poor for both but there are online videos to help. I do resent paying for a recipe book on top of the amount these devices cost.

Overall if space is an issue, if you are keen to use obscure modes, and if price is a key factor, wait and watch until the IP goes sub-£120 and order that one. The Ninja low price is around £150. You need more space on the worktop and for lid storage. But clean up is easier and using other baking containers is simple. I prefer it but whether that preference is worth an extra £30 I don't know. They are both great kitchen gadgets that for some will render a conventional oven superfluous. I wouldn't be without one frankly.

Added: I've done a few beef and chicken slow cooks with the IP now. 10 mins pressure cook first then with the same setup up to 12 hours low slow cook. Works really well for great results. I still maintain that cleanup with the Ninja is better and quicker but the food itself was fantastic."

I know times change, but I think this is merely an OKish price. I think folks that aren’t in a hurry might want to set a camel alert at 135, as I recall this being below that fairly recently.

// 115 Costco members a month ago, 119 Lakeland, John Lewis etc six months ago.
These things do come on deep discount from time to time. (edited)

Yes it's got two lids & you've got to swap depending on how you're cooking, but it takes up soon much less space than a pressure cooker and an air fryer.
Does a lovely job too!