Pros
First and foremost, Box.net is operating in one of the most exciting, high-growth technology spaces in cloud computing/software-as-a-service. So, not only is it make a difference on the actual work you do, but knowing you're working in an exciting sector is personally satisfying. Box.net also has an excellent management team, driven by the original vision of our co-founders and experienced managers that have achieved success at other great companies like Google, Apple, WebEx, Yahoo, LinkedIn and others. The culture encourages people at all levels from every department to make an impact on the entire company - that means encouraging ideas not only about the product, but how we do things as a company, even down to simple, daily quality-of-life issues. As a growing startup, people naturally get to wear different hats and often pick projects that are interesting to them. On the same note, even has a growing startup, there are nice perks like free lunches and subsidized parking/transportation expenses, which is great for people that drive in from far away or take Caltrain. And last, but not least, there's a close-knit family atmosphere here. People here are smart, love to have fun and take a lot of pride in what they do and how the company does. It's great to be able to come in and enjoy working with all your colleagues.
Cons
Since Box.net is a startup, there are still some perks it still doesn't have yet, like matching on 401K contributions - it's not unlike other growing startups, but I expect that it's something the company should be able to offer in the not-so-distant future.