This is a great feature that WORX offers. Don't have to worry about shopping around to find replacement spools/wire. Just click and ship, which they shipped very quickly. These replacement spools make swapping out very easy. If they weren't free I'd would probably be buying wire and trying to re-roll my old empty spools.
I recently purchased the weed eater and blower. It came with two batteries that recharge in no time . In addition the tools are so light weight that clean-up of a really big backyard is done in less than 2 hours. The weed eater furiously goes through weeds and it's quite adaptable ( as seen on tv) to small areas. Extremely happy with my choice of tools!