Pros
If you're fresh out of college and looking for legal experience, you will learn a lot. This is a good stepping stone for those ready for law school and are looking for a bit of experience and contacts. You might be lucky and get into a great team with a solid attorney. You will meet some really great people.
Cons
You are thrown into the deep end from day one, and are expected to push out cases with little training. Your wages are pretty low and you'll have to get several promotions to make a semi-livable wage in Silicon Valley. They only seem to hire inexperienced people. If you're a seasoned paralegal, you're still starting at the bottom of the food chain. You will be overloaded with cases, micromanaged, and your well being is less important than pushing out cases for endless clients. Constant stress and pressure to push out cases without a lot of concern about your well-being. Feels a bit like a sweat shop. The turnover is extremely high, but they don't seem to mind.