I haven't installed one and my machine is a bit different as it is a Z950R but I can't imagine it is all that different.
Probably the hardest part is going to be mounting the pulley on top of the right spindle. I assume it just bolts on though. Other than that you are mounting the bracket to the deck that the PF hangs on. They might have to cut a notch in the discharge chute deflector for belt clearance. Then whatever brackets make up the collection hopper or bagger.
In my case the collection system was already on the machine as they were bought together so I wasn't going to have them take it off to put it back on myself.
My unsolicited advice... dont get it. Its the biggest piece of poo ive ever seen and the engineering should be an embarrassment to carry the JD name. It clogs super easily, always seem to be disassembling to clear the wheel. It also fills up it seems like in minutes. You spend more time emptying it than mowing.
$200 isnt terrible. I can see 1-1.5hrs on the initial install, specifically dealing with the deak, belts, pulleys chute etc etc.