OK. I was one of the lucky ones that got a FREE sample. PivoTrim asked for an honest review and that is what I intend to leave. Pros: Works excellent against concrete, fencing, etc. String lasts a long time. Easy to install. Simple line loading. Cons: Takes a long time to load. Bogs my trimmer down in heavy grass.(It is a lighter commercial trimmer, but it would cut it with normal head) Must have precut line. Conclusion: Definitely has it's place with solo and homeowners. For a larger operation it might work as a specialty trimmer, but not as an everyday trimmer. Thanks for the free head. You guys seem like honest people.