I've owned my set for over 6 years and have gotten more than my money's worth from the set.  The number of times I've had to start my pilot hole and then set the screw goes on and on.  With this, it's so simple to start my hole, flip the bit and set the screw.  After 6 years, one of the bits stopped snapping back into place cleanly.  However, there are 3 other bits in the set and I switched to one of the 3 remaining and things are fine.