I used the yli invisible thread for a Christmas panel and it was the first time I ever used invisible thread. I was terrified by the horror stories I read. It was a piece of cake. Thread didn't break once and I just went slowly. I outlined the figures in the panel (also my first time) and did SITD in the border. Machine is a janome 8900 and needle was 80/10. I used king tut 40 in the bobbin. I colored the end of the invisible thread with black magic marker so I could find it to thread the needle. Lowered the upper tension to 2.5 on my machine.