Arrived at terminal 3 went to frontier checking and thought the person taking\n me in was rude. Wanted a different seat. Ask if I wanted to up grade. Moving over a seat in same row is upgrade, would cost me .  Then looked at medical bag and wanted to charge   Cheap cheap cheap. Flying is becoming joke. Nickel and diming to death   Flight was on time stewardess 's were friendly. Just airport personnel,need a course in being friendly