Easy assembly-( FAST ) and works like a Hummingbird--even cuts large-thick Stuff without your line breaking. Did my 65' X 25' overgrown lawn with Himalayan Black Berry Starts and patches of Dock in my weed infested lawn in a comfortable non Back Pain , Quicky and Easy 15 minutes--non stop-1st Battery Charge; Plenty of Juice left for the next Cut .