I hope my first post wasn't too negative, I was just voicing my own concerns in line with the thread. Overall, I am extremely happy with the UGCs that I have. They line up great on my shelf, they hold my N64 games great, and they display the great art on this site.
Being able to hold many different cartridges is great for other collectors too since your collection can look more uniform. And it's ideal that we have the UGCs as a standard to make covers for and to plan around.
And like mojoe said, they are great from a monetary standpoint. I can purposely seek out out-of-box games and know that they will still look great. And the UGCs are "indestructible" in comparison to cheap cardboard boxes.
So, basically I hold an opposite view of the OP. My "complaints" are really just me nitpicking any fault I can find.