He encontrado una review del protecto para el Nexus 4, y parece que hablan bastante bien (en inglés):
http://forum.xda-developers.com/show...180060&page=25
The screen protector looks fabulous on both the screen and the back. The clarity is awesome and does not compromise even a bit on the superb HD display of the Nexus 4. Look at the pics with Angie staring at me. Hehe. Looks absolutely stunning. The touch feeling is also very smooth and almost feels like glass which I think is the best feature of this shield