I have flown Turkish 8 times in past 2 years and i had nothing but great experience. I used to take Qatar, Etihad and Emirates earlier but took a risk once due to Turkish's short transit time in Istanbul, i tried them and been their passenger ever since. It used to be 4 hours transit from US to Nepal and 1 hour when returning back. Also their arrival time in Nepal was 06:35 am which was helpful for me to take domestic flight at 9:00 am.
My experience with them:
-Flight was never delayed.
-Flight attendants were kind and helpful.
-in-flight entertainment options was good.
-Plenty of meal and seat options.

few months back, i brought my friend's parents with me to US on Turkish. They too had a great flight experience.