Everyone is very professional and has your best interest as a priority. The worst part for me was trying to sleep that night with constant tears flowing down my face but I dont believe everyone reacts the way I do. I have always had sensitive eyes and allergies. There is nothing better than waking up in the morning and being able to see everything clearly (the few hours i was uncomfortable is worth it). It did take the full 2-4 hours but they do tell you the time limits and personally I wouldn't want to go somewhere that makes me feel rushed with something as important as my eyes.