Sound level seemed fine to me.
I definitely like the packaging. It's the first Trek DVD set (not counting movies) where I've ever kept the original packaging. The others I all threw away and put in those sleeves you get. I bloody well hate it when DVDs come in such elaborate packaging that you have to take out a box, remove a sleeve, take out another stupid box, etc. etc.
Yeah I was pretty happy with the packaging as well. I don't mind some of the more elaborate box sets, what I do hate however are poorly designed sets where the disks come loose during shipping and get all scratched up. This design seemed very solid. Granted blu-ray is far more resistant to scratching in the first place.