I have only had them on the car for about 7 months and maybe a bit over 5,000 miles. Long term it's hard to tell, but so far so good. They are even taking our cold temperatures (below 0 deg) well.
Oh wow yeah looks nice! So the center is yours just blank silver? I tried taking a hubcap off last night lol was so hard to put it back on. I can't decide if I wanna go black on silver... I kinda like the silver on silver
From the factory, there is no center cap. You can buy electric knock out plugs from Home Depot, Lowes or Menards and they fit in there (you may have to bend the tabs). You can paint them what ever color you want. Here's a thread with the details: http://priuschat.com/threads/3-buck-alloy-wheel-center-caps.79133/