The Takeaway: Echo’s trimmer is a good fit for heavy-duty users who require durability, cutting power, ease of use, and easy maintenance. Simple, Easy-to-Use DesignEcho built its reputation by building powerful, easy-to-use outdoor power equipment, particularly string trimmers, a product category that it knows well. When you have about 10 ft of line on each side, you hold the trimmer by the head while turning the rewind knob clockwise. A gear case at the top of the line head uses a nearly 2:1 (1.62:1) gear ratio to maximize that engine torque. Other Great FeaturesThe Echo is a costly machine, with a price that reflects the heavy use by professionals.