My 572 I the best behaving AT or Mtronic saw I've owned, one pull when warm the vast majority of the time, and if not she will fire in the second. The 550 and 562 are almost unusable above 85°f below that not too bad.
I really have no idea what Husqvarna is thinking with sosome of these things. I mean if you knew constant updates were going to be needed, make it easy to do at home, a simple app and USB connection. Designed by committee and a lot of cheap outsourced parts IMHO.
Sorry I'm not bashing Husqvarna, I have eight of their saws righ now, and many more throughoutthe years, but they need to right to ship.