Quoted from pookycade:I have one on my paragon and haven't seen the issues you are reporting. Really quite happy with it especially with leveling of cupped inserts.
A few years ago I had a Paragon with cupped inserts and one of these protectors (I was waiting until they made it and ordered it ASAP). I found it was awesome. I also put one on a RFM and it was pretty good, though I did sometimes get a ball hanging up on one of the roll overs. I didn't see those issues either.
For cupped inserts they are a good playable fix.