Uber

Uber is jam-packed with amazing talent. There are so many hard engineering problems, product problems, and finance problems. It's easy to learn a ton, and it's awesome to be a part of such an interesting company. I can say that I've met many fun, incredible people there, and I do believe Uber is making a tangible change in the world.

The company as it stands today is a pre-IPO slaughterhouse. Depending on what team you're on, or the luck of the draw, you will be guilted into working crazy hours. After all, everyone else does it, so why shouldn't you?

You will be on-call 24 hours a day. You will be judged heavily by your "commitment to the company." Your personal life is absolutely meaningless. Uber will need to be at the forefront of your mind at all hours of the day, and even in your dreams.

TL;DR: There is no work-life balance. You will burn out.

People's lives outside of work are important. Probably more important than your expectations for their work.

Creating a top-down culture of stress and pressure to perform at all hours of the day is not healthy for the company in the long run.

You should foster all of the things that make people happy. You want people to whistle while they work!

Engage them, give them opportunities, but more importantly, respect them. Your employees are not cattle that can be whipped and demoralized. You will lose your top talent that way.