Second (abbreviated) posting - the first got lost in the ether

They last, and last and last.

I've had a set on my D18 for 6 months, and on a Simon&Patrick SP06CED for 10 months! Both in regular use.

I usually change my strings at least every three months, whether they need it or not.

When CFM&Co find out how long they last, thay'll probably stop making them, or double the price.