What's the story there? Man, I love my Wilwood stuff on my car, and would do it to the truck in a second if I could afford it. Sure, you have to order parts, but then... it never needs parts. It's perfect. They last forever. I don't think I'll ever need to replace the pads or rotors. Well... ok, the rotors are starting to show some signs of heat stress. But it's been 5 years and 15 trackdays.
Well the rotors kind of self destructed on me during the '08 UA. They cracked between ever wheel stud hole. Also one of the calipers sheered off the light weight aluminum mounting brackets (happened to both rear corners at different times and ripped the brake line off both times - first time happened while getting off the interstate on an offramp at about 60 MPH......good times!). And the pads are proprietary, so if you're in the middle of no where and something happened that would require a new pad (not likely, but anything's possible...trust me

!) then you're S.O.L., unless you carry spares with you.
Wilwood makes some awesome parts, but IMO they're more geared toward the hot rod community and not really as much toward the abusive off-road stuff. PartsMike experienced the exact same problems as I did while running Wilwood stuff on his Jeep and ended up removing it all. I was running the Superlite 4-piston calipers in the front and Dynalite 4-piston calipers in the rear.
I've had the pleasure of driving home from Rangley, CO to Hendersonville, TN (1,441 miles) with the rear calipers and rotors in the bed of the truck. Had I been running what I am now (hindsight's a beautiful thing, isn't it?), I would have been able to pick up replacement parts at any parts house......of course, if I had been running what I am now.......I wouldn't have had broken brake parts in the first place

.
The heat marks on the rotor is where we attempted to weld them on the back sides, both both rotors broke in the same manner.
My mindset is now K.I.S.S. - keep it stupid simple

.
Which brings me to another point, I keep a parts list in my glove box at all times. I also made a spreadsheet that lists maintenance tasks that I keep in the glove box.