I find it looks good and in the middle of the envelope it flies ok, edges of the envelope you can forget about any level of realism.
But the biggest thing, it's boring, I have a great system with lots of add-ons, it looks great flies smoothly, but anything above a 15 minute flight to another airport or circuits etc. it gets tedious. I always end up low flying, performing aeros, or some ridiculous manoeuvre to land.
Stick me in a cessna/piper and I can fly for four hours cross country and love every minute of it. Same thing on the sim and I'll be bored beyond belief.
As it has been said before, for any real use procedural training and familarisation is the best you can use it for to reinforce actual flight.