I've always read all these threads about the different string trimmer lines. Everyone seemed to have their favorites for one reason or another. To tell you the truth, I always thought the differences from one line to another would be so minimal, that it would be very difficult to tell them apart. Well today I used a different line, and there was a very noticeable difference! When I started a few years ago, I bought a huge spool of green, round line (I'll have to check brand and size). So that's the only kind I've used all this time. I recently bought a new head for my trimmer and it came already spooled with orange, star shaped line. This stuff is great. I can definately tell a difference. It just cuts through so much smoother and easier. It feels like the difference of using a dull blade verses a sharp blade to cut something. It must be the edges of the "star" shape. It feels like it's actually cutting through rather then ripping through like the round stuff. Just thought I'd share.