So far here is MY quick take on the 592.
The good.
One of the strongest running stock saw I've had my hands on. Smooth, good weight for it's size, good value and it seems built robust overall, and I simply like how it feels. Instant acceleration, like a ported saw.
The bad.
The intake setup/wiring is 10 lb of s*** stuffed in a 5lb bag, bit of a pain to work on, especially compared to say a 395/390 or even the 661. Oil output sux IMHO. No lighter than a 661, some of the fasteners are aluminum, and one time use. The carb on mine leaks a little fuel on the pump side, the cap doesn't clamp enough. Bangs off the limiter like crazy. Overall quality is so so, and some parts look expensive.
Conclusion. It's a chainsaw, it will do what it needs to and likely do it extremely well. Nothing ground breaking, I probably prefer the 661, but that could change. I'll keep my ported 395 and 390, the 592 will be moving on.