Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: I'm a Troy-Bilt guy. My old trimmer lasted about 12 years and I had all the attachments so I wanted to stay with the same brand. Bottom line is that this is not a good product. The engine is extremely cold natured meaning that without the electric starter you can forget it starting before you end up with blisters from the pull cord. Once it warms up (and it takes a while) it is not half bad. But the killer is the trimmer head and trying to restring it. I'm not an angry or violent man, but just yesterday I had to walk away after 20 minutes before I just smashed this thing to pieces. The instructions are completely wrong....there is physically no way to string this thing as they say as the string cannot pass through. The old head was a bit of a pain, but it worked. This you have to take a screwdriver, pry (i.e., bend the heck out of it) to get it apart and then you have to wind both sides (one on top, one on bottom), then pray that you can line it back up and snap it back together. It's probably a two to three person job to be honest. When you get it started and warmed up and it's got a full head it works. It's just frustrating to spend more time putting string in this thing than actually time spent using it. I am definitely in the market for an aftermarket head right now.

Worst design in the history of anything in modern history