Instruct: Classify Amazon reviews into positive or negative sentiment
Query: OK, it works.

Gotta admit I was a little leery of the claims, but I just trimmed my entire yard without changing line. I have been using .105 generic, and I usually change either 4 or 5 times. I tried .155, but it bogged down the trimmer and was hard to insert in the head. This size is perfect, and the durability is fantastic. I trim around landscape rock and brick, and I kept looking to see if it had broken or worn out yet, but nope, good until done. Wore about an inch or two off each side, that's it. I am sold.