Aero-Flex String Trimmer

I hate (a strong word I reserve for the most deserving) regular string trimmers, the kind you have to wind easily-breakable plastic string around a hub and never feeds out when "bumped".  I know it works for the pros, I've seen it, but this once a week home amateur needed salvation and it has been delivered with this Aero-Flex head that uses the pre-formed and easily installed lines that you see below (with the cover removed). 

https://aero-flex.com