I have already purchased a replacement mat for my portrait and have had the same experience with both mats. They don't last very long even when following the cleaning/maintenance instructions from the company. I have also made sure I keep one strictly for use with any glitter type paper because it is horrible for the mat.

Doesn't stay sticky very long for the price. Seems like I can only ever buy them online.

I've used it quite a bit and it's still sticky... Not as adhesive as it probably should be though. Not sure if I'm expecting too much or if they will improve it.