Color me shocked that something actually lived up to its billing. I recently purchased a cordless string trimmer. Just a smallish homeowner model for my 1/2 acre residential plot. The convenience was really nice, but the thing cut like junk. Some tall grass it would bend over instead of cutting. It would take a few passes to cut.
Some new line with a pentagonal profile was spooled onto the spool, and I gave the trimmer a go. Hot darn, it works now! Areas that would take multiple passes now took one pass. The edged areas also looked a lot neater. Thicker weeds that had given the previous line an issue were dispatched rapidly. Huh, this thing really is living up to its billing. Too bad it didn't come with that line to start, instead of the bargain-basement line.
Just proves the old saw that better consumables means better tool performance.