REASONS TO BUY
Sometimes only piton that works in horizontal cracks and under roofs
REASONS TO AVOID
Not as secure as Tomahawks and Peckers in most situations
Can't be used for clean aid
Rurps really only excel at two things: horizontal cracks and under roofs.
RURPS are hard to place securely. You often need to hit them really hard which makes then difficult to clean. Since the only way to clean is often to yank out on the cable, the cable often breaks and leaves them fixed.
It is unfortunate that Black Diamond uses #2 cable for these. As Mike point's out below in the user reviews, these would easily take #4 cable which is wider, stronger and much more durable. Since RURPs often get fixed, the number two cable quickly breaks leaving a worthless steel-filled placement. BD, please go #4 (or at least #3).