Google

Lives up to the hype. Super smart people. Awesome perks. Pays well. As an engineer, lots of choices – can switch teams and offices with relative ease.

No one is perfect. No company is perfect. There are great people and there are jerks. There are great managers and a bunch of not-so-great ones. If you go in thinking this is some utopia that doesn't have politics and bureaucracy, you'll get disillusioned really fast. And it's a company full of overachievers, so it's hard to maintain work-life balance if you want to keep up with your peers – unless you explicitly force yourself to only work a certain amount.