25 years ago, I threw away my last electric weed eater, and swore I'd never own another one. I wanted a gas powered one, but one I bought earlier, a POS Craftsman, never ran right. So I did some research, and I watched lawn service trailers while I was driving, to see what brand they trusted. 90% of the lawn service trailers used Shindaiwa. (The rest used Stihl or Echo.) I went to a local dealer, who also had a lawn service, and talked with him for a while. One question I asked him was how long the Shindaiwas lasted him, using them for his lawn service. He told me about 5 years. That's using it every day, all day, from March to October, for five years. I did a little calculating, and I figured a Shindaiwa should last me 60 years. So, I put down the money for a commercial grade T270 gas trimmer. Again, that was 25 years ago. I replaced the spark plug in it, for the first time, about 3 weeks ago, only because my son damaged it. Other than that, the only thing I have done is replaced the trimmer head. Summer, winter, it doesn't matter, it will, and always has, started on the third pull. I paid about $270 for it 25 years ago. It was the best money ever spent on lawn equipment. I plan on it lasting the rest of my life. About 2 years after I bought my trimmer, I bought a Shindiawa leaf blower. Same thing. I've never even replaced the spark plug in it. 23 years later, it will start third pull, every time. I will never use anything but Shindiawa lawn equipment. You want a chain saw, get a Stihl. You want a string trimmer, get a Shindiawa.
I know you didn't ask about gas trimmers, but I will never trust another electric one.