OK, so after a month of intense ashtanga teacher training, with the mat suffering about 4 - 5 hours abuse everyday... I'm sad to say that there are little holes appearing where the feet and hands go on the mat.
The up side is that there are no flakey bits that come off, like the regular PVC mats that start sticking to your sweaty arms and legs. It just seems like the holes are appearing out of thin air. I reckon my problem is rolling over toenails from Chaturanga into Up-Dog, which causes the abrasions where the feet are, and dragging my feet on the floor in jump-throughs, which causes abrasions where the hands are. (Yes, I need to engage more core as I jump through. I'm trying!)
Not such a perfect mat after all. It's still fine to use for now coz it's not getting in my way, but at some point down the road I'll probably have to bite the bullet and get THE Black Mat. Except that it's 3kg. Sheesh.
(And for the record, my toenails are nice and short and kept pedicured, so I don't understand why they've got such ripping power.)