I've used an Actifry and it does produce good chips - not as good as deep-fried, but better than oven chips. I was surprised at how nice the chips were given the small amount of oil used. Not sure how effective they'd be at bhajis/ samosas etc. If I was you I'd probably opt for a deep fat fryer - you're much more likely to get better, albeit less healthy, results cooking bhajis/samosas/onions rings, in my opinion.