Great for business short hops. I'm not sure I could go much more than 1 to 1.5 hours on SWA.
Positives:
Happy employees
ontime--mostly
Free bags
Easy to change flights
refundable tickets aren't that much more
faster internet than GoGo Wireless
Negatives
Old planes
Weird boarding process
really crowded with inexperienced travelers
Net-net, I'll fly Southwest, but always allow for extra time. I guess you can waste time with an always late airline, or standing in a crazy TSA line. Air travel needs an overhaul!