I bought a little Honda bent shaft in 2006 or 2007, run premium fuel in it always, it has never missed a beat, and true to Honda's claim, it starts every time. Couple of pumps on the primer, choke on one pull, choke off second pull and it's away and running.
And no mixing fuel.
Shindaiwa stuff is good too though, we had Shindaiwa gear at a mine I worked at, chainsaws and whipper snippers for clearing under and around power lines, general tidy up around the place, the local hire ratbag no hopers that used to get paid to do the clearing treated the gear like sh!t, and it survived.......