I'm thinking that Staples may have shipped the wrong thickness mat to me. I'll have to get my digital calipers out to check but it seems a lot thinner than .130 ...... More like .85 by the looks of it unless they count the small pegs as part of the thickness. If this is the case I'll be getting in touch with them really soon!
I purchased this more expensive chair mat ~18mos ago hoping it would last longer than the cheap one but it started getting grooves & cracks fairly soon. My carpeting is not that thick but I still have to replace the mat much sooner than expected so I'll go back to the cheaper one. It's not worth the extra $$$ (+I cut my foot on one of the cracks!)