No, my local independant took the challange on.... mechanically I am fine having owned kit cars, but I hate electrics.
Anyway, it took them around 12-14 hours to install...(6 hours dosn't sound likely) for a stage 2 kit, which involves a lot more work, removing the bumper, fitting intercooler etc. The earlier kits required a bit of custom work on brackets etc, but the niggly issues should have been smoothed out now and the install process made more efficient.
Well... that was my theory for the charger... totally transforms the car, just when I was thinking of changing, but couldn't find anything I like. It brings a grin to my face each time I take it out.