Mine wouldn't idle out of the box and would bog down as soon as you hit the throttle , it also just had a hard time starting.
Luckily for me i had a set of adjustment screwdrivers for the carb , and after adjusting the carb it now runs very well and cuts like a dream , as far as longevity/reliability goes i can only speculate on that later on a few months down the road , so far it was $125 bucks well spend.