I have a Kitchenaid one. A bit more expensive, but I’ve had it for several years and use it a few times a week. It has several pre set programmes - low and high slow cook, simmer, boil, and sear. You can also set for things like soup and risotto. But I love the fact that you can sear meat in it before slow roasting or braising, and there’s an independent temperature setting, so very controllable.
Just to digress a bit, has he thought about a pressure cooker ? Mine gave out a couple of weeks ago and I was looking in the Black Friday sales for a replacement. Came across the ‘Kuhn Rikon’ website and plumped for something called a Duromatic Inox pressure cooker, and I’m really impressed. They’re a Swiss company and the quality is superb, but what really surprised me is how different the principle is - no more messing with jiggles and loud steamy cooking. You just put your ingredients in and heat until the button at the top pops up to show a red line on the steel rod beneath. Keep the pan on the same heat level and a second red line appears - you use these two pressure levels according to the food you’re cooking. The heat controls the pressure - when the desired pressure is reached you turn down the heat to keep the red line/s in view and it’s virtually silent.
De-pressurising is easy too - just take it off the heat for five minutes and then press the button at the top to release the pressure. I’ve been dying to tell people about this, as you can probably tell !!