I've had the non-responsive screen problem before from a screen protector that wasn't installed properly. What I'm trying to say is that it's probably not the protector itself but how you placed it on the screen... Be careful not to wedge or force the SP under the edge of the case as this can cause pressure on the screen.

As for good SPs I personally recommend either Boxwave or Brando they are both pretty much the same (there is someone in another thread who thought that Boxwave had better Anti-glare SPs - but I bought one to compare to Brando's Anti-glare SP and do NOT see any difference).