Worst airline ever ... i didn't get my bag when i reached athens (i was not the only one) and then there was no staff of the airline there and no counter or any number to call on ... the airport luggage people made a report and told me its a very normal and everyday thing with turkish and they leave luggage bags at istanbul during transit and i should expect my bag in the next flight. However when i did not receive my bag and the airport staff was so reluctant, i myself called their istanbul office where nobody took my call and then delhi airport office where they took my call and told me my luggage was there with them. So i tracked my luggage before the airline people could, thats how good their coordination is. So finally i got my luggage the next day as i made sure these guys would put it in the next flight by repeatedly calling them and making sure they don't be as reluctant again. The other services of the airline like food and courteousness is terrible and their staff is rude and reluctant with a very i don't care type attitude. They treat their flights to european desitantions like domestic flights and have very small bad and old planes in those flights (even dirty). I experienced these things in both my first leg to athens and while my return from milan. While coming back, they opened the counter only 2 hrs before with only one check in counter working and no online check in working on the website earlier so it was all a mess. I got so frustrated standing in a que for sooo long and missing all my duty free shopping from milan even after being 3 hrs before just because of these guys. Both the european connections were delayed. There were so many other small little things that just made me hate this airline in total. On my return, i again did not get my luggage and the same bag but however this time the airline was not at fault as two other girls accidently took my bag instead of theirs and later the airline staff helped me in getting my bag back (my reason for giving them more than 1 star).
I have flown with other middle eastern carriers as well as other european carriers to europe earlier and all my other past experiences have been significantly better than this. Please never fly turkish. The only other airline with staff even worse than theirs that i have experienced was china southern airlines. Hope this all helps.