The case for the Hyperion is functional, provided you cut out the area around the buttons and USB. Easy to do and takes one minute or two. IMO, the case should have already been designed that way. Probably cheaper though to make as is.
I have had one dumb drop since using the case and the GS3 shows no damage. Case for $11 delivered has already paid for itself.
The noted case in this thread seems to add a lot more size, even compared to the 4000 mah Hyperion and case. Also notice the need to deal with the cover. Seems a better fit design for the Note phone or other tablets.
BTW, seems the material design could hinder the radios to some degree. Will be interesting to read reviews of results.