Yes ... we are using them ourselves on some commercial products, and didn't want to use a cheap plastic case.
You suggestion on grounding is a good one, we don't currently have a specific grounding screw on the case. You could easily drill a hole and use your own screw. Do you have more details on how you would want to see this if we incorporated into a newer version of the case?
Finally, a proper case! Nicely done! Looks solid, and can probably be run over by a truck without any problems.
Do you have the ability to "ground" the case? (I have a project and it was randomly locking up/freezing after running for several hours if I touch it after walking on carpet or generating static electricity. Solved it by grounding the case.)