Relatively easy, hardest part is lifting the AC out of the way. It's not heavy but that's relative also.
More durable than OEM? Why sir, that's why you will be up there, OEM sucks as you will see when you lift the AC.
There are suggestions as to what tape to use so you may or may not have it happen again but if it does you'll know where to look.
2013 Voltage 3800, 2012 Chevy 3500 HD
2010 Yamaha V Star 950
2009 Yamaha Raider
Volunteering with Habitat for Humanity Caravanners