We bought an AF about 3 weeks ago and have only had one failure with it - crinkle cut chips - they were bullet proof! But chunky chips or homemade chips cook beautifully.
Our AF is a Breville (from Lakeland) and came with a 3 year guarantee. It has 3 wire shelves, a drip tray, a rotisserie and a rotating basket for chips and similar things. It's very easy to clean, all the shelves etc can go in the dishwasher but are just as easy to clean by hand. The glass door detaches and the stainless steel interior just wipes out. There's an interior light so you can watch cooking progress. It has preset programs for chips, chicken, vegetables and meat, but we usually use the manual functions to select temperature and cooking time. We treat it like a much smaller version of our main cooker, just reducing the cooking time because it's a smaller compartment. It's handy having three shelves as we can cook different foods at the same time.
Jacket Potatoes cook really well - 10 mins in the microwave and 10 mins in the AF - Voila! crispy golden skins and soft fluffy potato. That's the time for 2 very large potatoes.
Sausages and Bacon cook well, they don't splatter, and Chicken (thighs or quarters) is especially tender and tasty. We haven't tried a whole chicken yet.
Roast Potatoes and Vegetables can be cooked on the shelves or in the tumbler basket - crispy and crunchy outside and soft inside.
Homemade Chocolate Brownies and a Victoria Sponge turned out well too.
We still use our hob and microwave and will use the slow cooker for casseroles, but overall we are quite impressed with our Air Fryer.
One thing to keep in mind is how you will warm plates if you usually put them in the oven while food is cooking. We now put them in the microwave under dishes of vegetables as they cook.