Plastic Bobbins...

[bambino-tasso.livejournal.com]

So, I'm getting a nice shiny new [or second-hand] sewing machine for Christmas...today, me and my mum went looking at Bernina's.
And we found a Bernette that wasn't too expensive, and did quite a bit, and the like...but it had plastic bobbins.
And, I seem to remember my Fabric teacher saying bad things about plastic bobbins, and mum said that one of her friends, who is a sewing teacher, had said not to use them.

Just wondering if anyone else had any thoughts on the matter?

also, in case anyone was wondering [because I was, until i found out], the difference between a Bernina and a Bernette, is that Berninas are made in Switzerland with Swiss parts, and come with a 10 year warranty, and 2 free services, whereas Bernettes are made in China with slightly cheaper Swiss parts and come with a 5 year warranty and 1 free service.