M8 via Custom ROM - Bye bye onscreen buttons!

Ended up uninstalling GMD because it started being unresponsive and it was cumbersome because to use it required more touches of the screen.
I had the same issue with GMD. Though, I haven't tried the Pro version, I simply switched to Ultimate Dynamic NavBar and it has been pretty good so far. I'm sure the more I use it, the more I'll find little nuances/annoyances with this one too.

But, its worth the try if you are still looking for something similar.
 
I tried Ultimate Dynamic and it wasn't as good as the pro version of GMD (my opinion, of course).