The power and cutting abilities has been equal and maybe even greater than my last gas powered trimmer. The line that came with the trimmer is super strong and I was able to cut thick weeds. I'll be investing in attachments such as a hedge trimmer.
I previously had a 24v string trimmer from another manufacture, but it was having trouble keeping-up with some of the thicker grass and weeds at my new house. I had already purchased other Greenworks products, so thought I would give the 80v string trimmer a try. This trimmer works great, and crewed through the thicket weeds and grass that I could throw at it. Having used gasoline trimmers in the past, I can say for a fact that this product can stand-up to them, no problem.
Not having to start my gas trimmer ever again is almost worth the price alone, but this really is a great trimmer all on its own. I just can't get over how powerful it is and how solid it feels in your hands. Starting and stopping is always needed with trimming, so to be able to just push a button to start and pull the trigger when needed is awesome (keep in mind it's silent when on but not running). I've yet to use all the battery charge, but I still recharge the battery between trimming and blowing while I mow and it's always ready to go at full charge. This is nothing like the electric or chargeable yard tools I've seen or used before, so huge fan here and can't recommend highly enough.