Anyone here using their Nexus 4 or 5 with the Glif? topic

http://www.studioneat.com/products/glif

This accessory just got my attention. Any comments on how well the Glif fits either the Nexus 4 or 5? I have both phones and I would like to use either phones with this accessory. Will the Glif scratch the phones? Any negatives about this accessory that I should know about?

Thanks!