I have owned an Actifry since August 2007 and, apart from sending the original one back because the timer seemed too quiet, I have actually been very pleased with its performance.
Unfortunately I have just had to send back my second model because the non-stick surface of the pan had become eroded during the cooking process (it looked as though the paddle might actually be damaging the surface as it revolved). The replacement I have received indicates that Tefal has updated the design in several ways, possibly because of adverse feedback (though still not that quiet timer). The pan now looks more robust with an enamel surface and the paddle design has altered and is now held on with a clip that needs to be depressed to remove and reattach it for cleaning.
Whilst I am disappointed that my Actifry failed, I would still recommend it for the cooking ability and the great results it produces. Having said that, I think it possibly should have been tested more thoroughly before launch to iron out some of the design flaws.
I would urge anyone thinking of purchasing one of these to check that they are not getting the original model. I did not mistreat my actifry but it did prove to be faulty. The newest model does seem to be of more robust construction and potentially more fit for purpose. I certainly would not expect a failure of the non-stick coating to occur after the light use experienced.