Anybody using this kit

[jeff's88silverado]

Anybody using this or knows a little about transmissions and tell me if its any good or do I need to go with something different my trans was rebuilt 23k ago

http://cgi.ebay.com/ebaymotors/GM-700-R4-Superior-HP-Shift-Correction-Kit-S74171-_W0QQcmdZViewItemQQhashZitem56416fa409QQitemZ370465022985QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories