Great and quite overlooked program I think as it can be transferred from both Citi and CapitalOne miles.
Underrated redemptions that I think are people are mostly unaware of is flights to Hawaii on United Airlines, just 15k Turkish miles roundtrip in economy and a crazy good 25k Turkish miles for business class roundtrip if you can find availability. I keep looking almost everyday for United's flights for EWR to either Honolulu or Maui nonstop in business regular award availability havent had luck yet!
Also good is any of United's nonstop flights between USA to India for 55k miles each way in business class, where for UAL theres no fuel surcharges so with Turkish its just the miles plus about 5 bucks in tax!