all data shows 4.1 if under warranty, other wise 8.9 hours.
once you get the right wheel well, all the related wiring disconnected, the dash board and evap housing out, it isn't too hard to do.
you also have to drain the refrigerant from the A/C system.
with no air tools and if you haven't done one before, i would guess around 10~12 hours start to finnish.
when you do it, be sure to use the right screws in each hole. some are longer than others and if a long screw goes in a hole for a short screw, it can cause problems such as binding the temp door.