Korean Air is a good airline. For the past decade, I have flown them across the Pacific several times a year. All of my flights have been in business or an occasional upgrade to the front cabin. Many of the negative comments are unwarranted. Wine is served prior to and during the main meal service. Water is served in a small glass, but the FAs are happy to continue to fill your glass. On the trans-pacific flights there is self serve water and ice available, along with bottles of water. The seats on long haul flights are in the process of being upgraded, but the old style seats are hardly uncomfortable. Cabin temp is a matter of personal preference, it has never been an issue for me. This traveler finds the new FA uniforms to be very attractive. Service is much better than any US carrier flying across the Pacific or intra Asia.
IMHO, KE is a world class carrier. The interior of the planes are clean and most importanly, the flights arrive and depart on time and safely. Isn't that why we purchase a ticket, for safe, dependable transportation?