Used them 3 times MAN - IST twice & MAN - IST - IZMIR plus return
All flights were good and very comfortable (leather seats)
Connection to Izmir was a trek and a bit manic as our outbound MAN flight was delayed.
Airline has expanded rapidly in recent years which means lack of gates = lots of airside coach journeys (great if you like impromptu ramp tours
)
Yes I would recommend them.