In August of of 2006, I installed Powerdyne's K10526-201 supercharger package on my 2002 S10 Xtreme.  Recently, shards of the impeller fins were blown into my engine, destroying several cylinders.  I replaced the V6 and Powerdyne refused to honor their warranty.  So I dissembled the supercharger myself to find that the impeller had scuffed the scroll, the impeller shaft was bent, and the puny roller bearing supporting the impeller was totally worn out.  Never buy a Powerdyne as it is just cheap junk!!!  

Pictures would be great....  

Yeah, I was always a little suspicious of their belt drive design. It's quiet, but I think Vortech or ProCharger are a little better quality. Sorry to hear about your bad experience.