There are a few ex Korean FO's at EK. I'm sure if you ask around someone will tell you who. The one I flew with loved it but said the lack of a command prospect made him leave. He said he usually flew about 60-75 hours per month and the layovers were good. Hotel in ICN was great. Good social opportunities if you are single. If you don't need the upgrade then it's a good place to work as an FO.