Power Trax rear end by Richmond Gears

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Has anyone installed the Richmond Gears Power Trax No-Slip rear end parts in your truck. It basically replaces the side and spider gears, no clutches but gives you a basically posi rear end I have tested it and when the one wheel looses traction the other grabs right away and you are on your way without a hitch just a little bit of noise. I was wondering if anyone else basically was experiencing the clunking noises. It works awesome, I can now do a 2 wheel peel for 3 car lengths before a one wheel peel for a car and I had to brake torque it.
Let me know your experiences with this if you have, only reason I did it was I came across it, with the original receipt from Summit for almost 500 bucks and it is still under warranty, it is less than a year old, and it was in a Chevelle for a few weeks until the guy went with a Ford 9 inch to get some tire width. I got it for 150 C so it was a steal. Takes longer to jack up the truck and drain and prepare the cover for reinstall than it does to put this unit in. Like I said no clutches...just springs. Anyway thanks in advance for opinions whathaveyou.