When comparing GreenWorks 21212 vs EGO Power+ ST1502, the Slant community recommends EGO Power+ ST1502 for most people. In the question“What are the best string trimmers?” EGO Power+ ST1502 is ranked 4th while GreenWorks 21212 is ranked 6th. The most important reason people chose EGO Power+ ST1502 is:
The trimmer has a 56 V powerful brushless motor in combination with a 0.095" thick string. The motor is powerful enough to easily cut down tall grass and even very thick weeds that would be impossible to deal with using less powerful weed whackers.
Specs
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Pros
Pro Perfect for small jobs
This trimmer has enough power to do pretty much every small domestic job you might come across. Additionally, this trimmer has a short yet precise string perfectly suited for small-sized jobs.
Pro Extremely light
This string trimmer is, in fact, one of the lightest trimmers available on the market. It weighs only 5.2 pounds, meaning that it's easy to carry around by pretty much anyone.
Pro Can be used as an edger
If you rotate this unit's shaft, you can convert this trimmer into an edger, so you can finish your garden work by straightening the grass at the sidewalk. While the edging function works well, it does take some time to become used to it, as no wheel supports the trimmer while you are doing the job.
Pro Excellent cutting capacity
The trimmer has a 56 V powerful brushless motor in combination with a 0.095" thick string. The motor is powerful enough to easily cut down tall grass and even very thick weeds that would be impossible to deal with using less powerful weed whackers.
Pro Has an impressive runtime
The included 2.5 Ah battery lasts around 40 minutes, but it is possible to install a 7.5 Ah battery that has the power to operate this trimmer for two hours non-stop. Just keep in mind that the bigger the battery, the heavier and more expensive it is.
Pro Solid
This trimmer has a solid and professional feel, as it is built with high-quality aluminum and sturdy, rubber-coated plastics. The construction does not feel loose or wobbly.
Cons
Con May need an extension cord
Keep in mind that this unit is a corded, so you may need to provide a long enough extension cord to cover places you need to trim.
Con Unusual string release mechanism may be difficult to get used to
While most of the trimmers release the string either based on the resistance or releasing it when you bump the head against the ground, GreenWorks have decided to do it differently. The trimmer releases the string when you release the power trigger. For some, it may be hard to get used to this system.
Con Not meant for tall people
If you are taller than 6', it can be tiresome for you to use this trimmer for long periods of time, due to its size.
Con Must be operated responsibly, since it can project stuff around
Because of the trimmer's high power and 15" cutting swath, it can throw around pieces of weed and even small stones with sufficient force.