Pros: Bleeding these brakes with the Avid Bleed Kit makes this process so easy anyone can do it.
Cons: Replacing pads can be pain if the piston gets stuck out.
Recommendation: I replace my hayses hydrolics to these and I've really been happy with the results. Yeah, there are times when the rotors will squell a lot but hey that just lets the deer know that I'm coming their way.
Pros: Good all-around brake system. Not quite the lightest, most adjustable, or most powerful, but possibly the best combination of all three.
Cons: Still can't eliminate all the squealing.
Recommendation: This may be the best brake (that won't break the bank) for the all-around rider. I replaced my worn out Hayes El Caminos with these. They aren't quite as light and don't have the adjustability of the El Caminos, but they are more reliable/trouble free. The tradeoffs have been worth it.