On the flip side - I haven't got one and have no desire to get one. More than happy with my chips (including BNS) in oven. .I know the actifry does more than just chips but I'm also happy with my normal oven/grill/hob (slow cooker occasionally).
I use mine about twice a week mainly for chips but you can do other things. I personally wouldn't have paid full price for it, got it half price in a sale. It's so easy to use, clean etc and love the chips!!
I have an airfryer and love it. For things like chips and roast potatoes I coat them in fry light and they turn out lovely. For other food such as fish cakes, meat etc I don't use any oil.