Glad to have them but I really wish they would work on being a little more undercover... They stand out like sore thumbs on SouthWest flights.
When you have two obviously fit 30 something males travelling together with untucked shirts making use of Southwest's Pre-Board for families with small children, the handicapped and the elderly it gets everyone's attention. (There is no frequent flier/first class pre board with SW and no assigned seats). When you get onboard and see they have selected aisle seats no where near each other and at 1/3 and 2/3+ down along the aircraft you can be certain they are Air Marshalls.
"Religions are all alike - founded upon fables and mythologies." Thomas Jefferson
"The way to see by faith is to shut the eye of reason." Benjamin Franklin