My lawnmower is 3hp, so this head made it destroy everything in front of it. It even cut small trees and I tested it with the included blades

Unbelievable head. It doesn't notice at all. I use it with a yellow round oregon trimmer line and whatever it comes across, it makes it history. But where it really works wonders is with the oregon flexiblade 4.0mm. It turns olive branches and generally thick shrub trunks into dust, literally. The disadvantages of the head are that sometimes you can't remove the rest of the trimmer line and you have to disassemble it. Also, after many hours of work, the springs of the round trimmer lines may not hold well at all, but there is no issue with the star-shaped and cross-shaped trimmer lines. It requires a powerful trimmer with lots of gas. Ideal for over 50cc and two-stroke.

I was not satisfied at all, very expensive and not practical when it comes to changing the fishing line, it doesn't come out at all, you have to have a pen with you and still it's difficult, many times I have to unscrew it to remove the fishing line.

The store's service is very good. The product is much cheaper than other stores, and it works perfectly. I have been using it for over 5 years and it is very functional.