Well this blade keeps on amazing me. It's been in my DE89 for at least 5, maybe 6 shaves now and the last shave was just as smooth as the first.
The first Polsilver I tried was a real disappointment, after reading all the praise on here I was expecting great things only to find it very uncomfortable and scratchy. It must have been a duff one, and I'm glad I tried another. Will have to see now, long term, if it was a one off or dodgy Polsilver blades pop up regularly.