I tried the Phantom SP but had 3 issues:
1) The type cover does not stick to the screen as strong as without SP when elevated. This is minor issue and I was willing to live with it.
2) There were 2 tiny spots where the glue was missing and was noticeable. Luckily these spots were on bezel so again I was willing to live with it.
3) This was the deal breaker. Even though the pen worked fine, the touch sensitivity was not consistent. The touch would work flawlessly for a while, but then it would become unresponsive. It was so weird because the sensitivity came and went back and forth without any apparent reason. I got so frustrated I ripped it off and the touch returned to normal.
The company did send me a replacement but I haven't re-applied it because I'm afraid of the same behavior.