Looking good so far. I've built a couple of work benches using a similar construction. Every time I move residence (which has been a loooot) I end up leaving them for the new owners
If I may be so bold as to offer a piece of advice, you might want to add a couple of cross braces...say one at the back angled say from top left to bottm right, and a similar type brace on the sides. Even glued and screwed, this type of constuction can work loose and become unstable.
Anyway, good luck and I'll be following your progress.