funny how you can get so many opposing opinions, from the best to garbage..........my only experience with arkym/pyspeed was with my front lip i ordered. I had no issues with pyspeed or packaging at all. But the lip did not fit good at all on one side. I bought the FRP(think that's what it was called....reinforced plastic) cause it was recommended when i said i was going to paint it to match my car anyway. Well, one slight bump with a parking lot cement thingy and it cracked right down the middle
I was considering their rear diffuser, but now after reading some comments maybe i'll stay away from Arkym altogether