rattleguard bedliner

Has anyone here tried installing a rattleguard beliner on their tundra? How did i go and how does it look? was the large kit enough and how did you fill the holes on the bed rails?
Their web site is: http://www.rattleguard.com/ but they sell the stuff on ebay too.
The plastic bed rail caps have rubbed through a lot of paint and its rusting on my 2001...I don't even want to look under the bedliner yet. For $180 I was thinking of taking off my bedliner/rail caps and spraying this stuff on after sanding the rust off.