i have a echo cs 271t that i use for most things i do i love it never a problem with it i also have a cs 590 w a 24" bar that is pushing the limit on power with that bar also never had a problem w that saw
had a schumacker i think the 3 rd time i used it it quit. out of warranty they wanted me to ship it to them for unknown repair cost. i won't buy another from them.
vtfireman is right on the money. as a retired electrican with over 35 years i would never back stab a switch or outlet i have repaired more than my fair share that were back stabbed. wire melted back from outlets 2-3 inchs