Very nice. Boxes are one thing I make on the CNCs when I just want to make something and don't want to work. Not that making boxes doesn't take effort, because it most certainly does, but because its just fun effort.
One of my personal favorites was a nicely fitted box I made out of shelf board. You know the stuff. Some kind of chewed spit surface laminate, and a core of wood chips. I made it so that the two piece were a light but firm press fit. I put a letter inside and mailed it off to my uncle who's winter hobby is wood working. He's been doing it for atleast 50 years. I thought he would appreciate the irony of making a nicely fitted piece out of crap. LOL. I didn't hear anything from him for a while, and then one day I received an email saying he had finally gotten my letter. He said it sat on his shelf for a couple weeks and he couldn't figure out why I had glued it together with spit laminate in the middle instead of cutting that off first. His daughter who was visiting walked in one day and said, "Dad, I think its supposed to come apart."
Of course I've done loose fit square boxes, and most of us have done the "heart box" or some variant of it at some point. My next favorite was an aluminum cylinder that screwed together in the middle. I tried to make it so the seem was invisible when closed, but you can see it just a little. Still my wife couldn't understand when I gave her a nicely finished piece of aluminum rod stock instead of the computer memory she wanted for Christmas that year. I'll give her credit. She didn't say anything right away. Just studied it perplexed until she saw the seam. Then the light went on.
I admire your work sir, and have to say you are a first class boxer. LOL.