I used mine for the first time this weekend (having never used a chainsaw before).
Overall, it feels pretty lightly built ... but I guess that's a good thing, since my cutting needs are pretty light. The bar seems a little flimsy to me; it's pretty long with a fairly light mounting. I think I'd like a 14" or 16" better if I was cutting much thick stuff.
I found it could vapor-lock and stall out when starting after it was warm. That was solved by holding it near vertical and revving it a couple of times. The fuel filter was rolling around loose when I got it, easily put back on the hose.
It was very thrifty on fuel and bar oil.
Overall, I was very impressed. I know Aspen is nothing difficult to get thru, but this little saw chewed thru up to 15" of wood without stuttering. It could wear me out pretty fast.