Fender installation is always a bit of a pain; each one is different and unpredictable. If this is your first time, stick with a plastic fender, they go on easier. I've used both the SKS and PB fenders, and honestly, once they are on the bike, there isn't too much difference. The metal fenders have all been more of a pain to instal, but once they're in place, they have all worked great.