On 10/07/2016 13:12, Syd Rumpo wrote:

The Tefal one slowly 'tumbles' the chips with a rotating scoop to ensure
even coating and cooking, it works very well but is expensive. I don't
think the cheaper ones do this.

ITYM its supposed to tumble them, mine does a poor job at tumbling them
and you need to qive them a stir a couple of times while they are cooking.