Takes about three hours - the hardest part is putting new pins in the plugs under the dash. Make sure that you take your time. Also, if you have a Sport or Sahara (Before 01) you may be prewired.
As for useage it works justg like factory.
Hope this helps.
Black Jeep Club V2.0 Member #13
Hurricane Jeep Club Founding Member
'04 Black and Khaki Sahara
"The Last of the Breed"
Dual Top, Dana 44 Rear, Discs All Around, K&N Filter in Stock Air Chamber, Hella Triple Air Horns, 31x10.50 Dueler AT Revo's, oh and XM Radio
Formerly - 99 SE Chili Pepper Red on 31x10.50's