Everything went perfectly before, during, and after surgery at the Gangnam location! I have no complaints. The staff are very knowledgeable, friendly, and accommodating! The doctor explained everything during surgery, before he would do anything, so nothing came as a surprise. I am more than pleased with how everything went and I would recommend this place to anyone, especially the Gangnam location! My vision is great! I can see 20/20 and am able to read some letters on the 20/16 vision chart all with my own eyes... this has never been the case for me! Thanks for all the help and support, guys!