I received my case today, and overall I agree with the other positive assessments.

There were two things that I didn't like about it:

• there is no access to the USB port
• the "kickstand" is blocked, which means that the case must rest flat when on a desk

I decided that I'll keep the N810 in the case almost permanently, so I've made the following modifications:

• removed the kickstand from the tablet (exposing the USB port). This requires an #4 Torx driver. I stored the left-side kickstand screw in the tablet itself, by screwing it back into the tablet.
• Cut a hole in the PDAir case to allow access to the USB port. This took about 15 minutes with a set of jewler's files....the case aluminum is very soft and thin.
• Once the kickstand was removed, the tablet was quite loose inside the case, so I added a very thin strip of neoprene padding inside the case to fill the area normally occupied by the kickstand.
• On the right side of the case, I cut a hole that aligns with the screw hole for the right side of the kickstand. I replaced the kickstand screw with a slightly longer one (~1mm longer) from an eyeglass repair kit, allowing me to mechanically bolt the case and tablet together, instead of relying just on the tension from the neoprene to hold the tablet inside the case.

I doubt that I'll modify the hinges myself, but a simple redesign in manufacturing would allow the cover to pivot further open (about 300 degrees, instead of the ~170 degrees that it now opens). This would enable the case to sit on a desk upright, like a capital "A", restoring the function of the missing kickstand.