After just three uses, the unit failed. Unfortunately, I waited two months to open the box and test it. I keep asking myself, why did I wait so long? At first, it worked wonderfully, and even better than I had expected. It fit my needs perfectly. Thereafter, the unit simply died. Since the 30 days to return the item had elapsed, my only recourse was to explore the warranty. I called GreenWorks and spoke with a very helpful representative in Customer Care. I explained the problem in detail and was told that the basic unit -- not the battery or charger -- had likely malfunctioned. It appears that I'll be taking it to a licensed repair facility -- about 35 miles from my home -- where it will be declared dead on arrival and replaced at some point under the warranty. Not particularly convenient, as the leaves and acorns become knee-deep in my driveway. I'm giving the item two stars -- one for the three remarkable experiences and another star for GreenWorks Customer Care. They tried to be helpful. We'll see how it goes from here.UPDATE:I raised my rating from two stars to four. I took my unit to the licensed repair facility, where it was fixed. As noted above, not very convenient, but the people in the repair shop were immensely helpful, courteous, and efficient. They returned the unit to GreenWorks and obtained a replacement, all under warranty and without any charge to me. The entire process took a few weeks. As it turns out, a switching device in the main unit was not operating properly -- and the charger may have also had a problem, so it was replaced. Since then, I'm back to loving this cordless leaf blower. It's relatively quiet, clean (no exhaust), and more than powerful enough for my yard and large driveway. The fully-charged battery lasts longer than I had expected, given my experience with other cordless yard devices. I'd give it the full five stars if the original hadn't been defective. So, here's the deal: if you get a good one on your first try, congratulations, you've got a very nice cordless leaf blower; if the one you receive is defective, plan on investing some time and effort in replacing it -- although, in the end, you'll also have a very nice cordless leaf blower. Good luck.UPDATE:I raised my rating again from four stars to five. My Greenworks leaf blower has worked flawlessly for over **five** years since it was repaired. I consider this purchase one of the best I've ever made on Amazon. It's in my Amazon Hall of Fame! Quiet and clean. Efficient and reliable. Who could ask for more?