They do look nice.... but to be honest, if it's actually silicon.... i dunno if i'd want it. That's basically my issue with the Otterbox cases. That outside cover attracts dust from alternate dimensions of your pocket. I can't imagine what the rugged battery cover might look like if it's the same material.
you know theres an infinite number of different silicones right?
also, i never understood why otterbox switched the silicone to the outside. how asinine