So, as with much on the internet, half of the information I've found regarding PU leather contradicts the other half.

I know that real leather is not a problem on the laser, I also know that PVC leather is a bad idea.
On the other hand, PU leather... I find as many people saying that it engraves great (even Epilog) as they say you should avoid it.

I have several PVC free leather supplier around, and one specifically says it's 60% Polyurethan and 40% Polyester (which I assume is the fabric the PU is bonded to).

So what do you think? Is PU leather as bad as PVC leather? Or is PU safe?
Any first-hand experience?