I used it for the first time in the garden, on grass - weeds that had been left for a year, some areas dry, in others 40-50 centimeters long. I am impressed. When the thread that came with the packaging ran out, I put in 2mm and it was excellent. I tried 2.4mm with very impressive results, it cut everything in a very short time. I also tried 3mm which barely fits in the trimmer. There it was a massacre, it cut like a chainsaw. It worked for hours without any issues and is super lightweight.
I can't write it more clearly. It definitely doesn't have the autonomy of gasoline, but with the thick threads, it clears the wild grass in half the time. Considering that I got it for under 80 euros and had it sitting around, it paid for itself in the first year.