1) They are brittle (as mentioned).
2) No matter what you use to mount them, the bolts/screws/whatever bolt through a tiny 1" plastic tab. These tabs will eventually break off completely.
3) The recommended mounting system relies on tapping into sheet metal. Not sure about you, but sheet metal is weak to me. I don't trust it to hold paint on, much less $300 worth of plastic fenders.
4) The company claims it has a satisfaction guaranteed, Lifetime warranty. That is until you break their flares and play the cross shipping game with them. I ended up spending more money shipping their flares back and forth than I did buying new flares.
5) The inner lip of the flare contacts tire at full compression. when the tire is tucked into the wheel well. With the Bushwacker, you cannot even tuck the tire because it will tear your flares off.
