Pros
The people at Box consistently make my day better. I've been working in the tech industry since 1988. I have never, in my entire career, worked at a company that has better people. I think this is for a few reasons, but the biggest seems to be (as one senior manager told me) "We don't hire brilliant xyzholes". Every time I ask the wrong team for help, they do everything they can to help me, and find the right place for me to get additional assistance. I have yet to think to myself "Ok, now I've found the jerk..." Add to that that Box LAVISHES their employees- The cafeteria is amazing, the cafe makes a killer mocha, management has their heads screwed on right and "gets it". Aaron Levi consistently says things that are both insightful and shows that he knows what he's doing. Of all the places I've ever worked (and there have been a lot of them, I've worked for some profoundly dysfunctional organizations- lookin' at you eBay), this is the one place that I can honestly say that if you have the opportunity to work here, you should grab it.
Cons
Some growing pains, but truthfully nothing unexpected. They don't have peanut M&Ms in the kitchens anymore, but the variety of snacks (and benefits) is still nothing short of amazing.