Pros: A great place to work hard.

Cons: A bad place to be a slacker.

Pros: Undeniably, the most fun, positive, rewarding, and life-changing place I've ever worked at.

Cons: Sometimes they focus too much on making this place the funnest place on Earth, and they fail to execute.

Pros: Business is doing well, seemingly in the right place at the right time. High-growth company, expanding rapidly in all dimensions, with free food and a fun environment. Charismatic CEO gets attention and buzz for the company. A new VP of Engineering is bringing maturity and leadership to the engineering organization.

Cons: If you're industry experienced (not "senior," as that's 1-2 years out of college at Box), expect to be working almost entirely with inexperienced/young engineers. Most are great to work with and want to learn; however, in general, the culture does not value experience. Be prepared to see lots of questionable judgment/competence demonstrated by the homegrown, tenured developers leading projects. Engineering caliber and quality of people are below Google/Microsoft levels. A surprising number of "seniors" are lacking CS fundamentals (OO design, what's cohesion, using assertions?). Some B's are hiring C's going on (... will hopefully improve as Box adopts a more Google-like model in hiring, reviews, etc.). Lots of untested legacy code, 10,000-line functions, tightly coupled, and fragile code are commonplace. Major efforts are underway to write tests and turn quality around, but it's very much a work in progress.