I just installed mine this weekend. It's pretty easy, just take your time and you won't have any problems. Just remember the old axiom of "Measure twice, cut once".

A couple of things to watch out for:

1. The instruction sheet specifies to tighten the nuts that screw on to the bulkhead to 30nm. I almost stripped one of them while tightening it. I would recommend changing the torque to "snug" +- 5nm. The bolts are pretty hefty and will hold the cover easily.

2. Be very precise when you mount & drill the templates for the hooks that go on the back by the hatch. If they're off by even a little bit the screws will be very difficult to line-up.