Is this tool any good?

I'd like to really clean my cuda's cooling system. Is this tool any good? Anything better out there?

http://cgi.ebay.com/ebaymotors/RADI...tZMotors_Automotive_Tools?hash=item4cec2cbe22

This is what I've done in the past:
1. I add a bottle of Prestone radiator flush
2. I run the engine for an hour then I turn off the engine
3. And finally, I open the petcock that's on the bottom of the radiator to drain out the coolant.

What do you all think...would this tool yield better results?