I generally try and avoid it (which can be difficult as it is everywhere) I find it not too comfortable and makes me sweat!
I was discussing with a friend yesterday as I know of a luxury brand whose jumpers, roll necks etc are now 95% polyester and cost over £120. She swears by them (though will admit herself she is a bit of a label junkie and will literally buy anything this brand produces) has them in every colour and admits she never looks at material breakdown and care labels.
I thought it was strange she would hand over alot of cash without checking this stuff and she thinks I am mad that I always check the labels on things before I buy them lol.
Does anyone else do this or is it just me? I really try and stick to natural fabrics where possible but maybe i am missing a trick. She swears they are great quality and wash well, which is fair enough I suppose as there must be different quality levels in polyester?