My original case
for the Nexus 2013 was bulky and made the buttons on the Nexus almost impossible to use as it slipped around in the case somewhat. This cover however solves both issues perfectly.
It's a very slim case, so it keeps the size of the Nexus down (doesn't turn it into a bulky book). The snap on design means that the Nexus fits perfectly onto the case and doesn't slip, allowing the buttons to be easily pushed.
I haven't encountered the issue regarding the strength of the magnet turning the Nexus off when the cover is folded around.