Picked this up yesterday to replace a mismatched knob. My retaining pin tool wasn't quite long enough to help so taking that off was annoying. As well, the compressible bible was a little annoying to get out of the cylinder, not to mention that the driver pins *will* fall out if you don't have the keyway at a perfect right angle, unlike most deadbolts. Aside from that it was a fairly simple process and installation afterwards was easy.