The only downside I can think of is the growing pains. This company went from 5 employees to 400 in a span of four years, however, the company is taking steps in the right direction to mitigate and eliminate the issues that arise from such fast paced growth. Work life balance can sometimes be thrown out of balance like any startup, you will be asked to work, and work hard - however, I never felt like any of the work I was doing wasn't meaningful.