Point taken but I think it is notable that Tissot only use plastic in the cheapest versions of the Powermatic 80 movement. If plastic really is as good or even a better material than metal, they would surely use it in all the versions. The self-lubricating argument also looks thin as it inherently assumes that the solid plastic is being worn down to produce liquid lubricant, not an issue you have with rubies. As Uhrologe says the Powermatic is a young movement and it seems as if there is not a great deal of evidence out there as to how it will survive long term. The difficulty Tissot have is that there are many other nice watches for sale which do not carry of odium of their movements being made out of potentially inferior materials.
Balthazar - did you end up getting a Farasute watch? If so, I would be interested in your opinion as to their quality. I confess I think they are very handsome and have been sorely tempted.
An interesting question. My feel is that it depends on how long you wear a watch for. If it is for a couple of days at a time, accuracy is neither here or there. If it is for weeks or months at a time then the accuracy determines how often you need to reset your watch (a pain). I am happy for my watch to be say two minutes out, so if I'm only going to reset it every two weeks that means a maximum inaccuracy of 8 seconds a day. In fact I feel it should be closer to +/- 5 seconds per day, so an ETA 2824 is the “worst” automatic movement I will consider in watch.
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