Google

1. Rapid career growth, at least 3/4 levels.
2. Lots of cutting-edge technologies (today it might be Google's internal one, but it will have industry-wide visibility).
3. Lots of smart people around.
4. Lots of fun and facilities in the office. No other company can match half of that for sure.

1. Everybody is very, very career-focused. They mostly don't have any other aspiration in life, so they spend a lot of hours in the office. This creates tremendous peer pressure.

2. Eighty percent of the current employees are college hires from the last one, two, or three years. Also, there are lots of food and facilities in the office, so they spend days and nights there, even on weekends.

3. If you want stable work pressure, stable work-life balance, and other interests besides your job, this is not your place for sure.

4. If you have 5-10 years of experience and want to join Google as your career pick, it will be hard to sustain. Because if you think you will spend stable work hours and don't need a promotion, etc., you will be the odd man out, and your feedback will be bad.

5. Middle management is not that efficient. They were all hired or got promoted because they are great developers. Now, managing different people and getting the most out of them are not their cup of tea.

As the organization is growing now, you need to accept the fact that all the employees joining will not be supermen. There will be a mix; you need to adjust the work culture accordingly. Also, try to improve work-life balance and other career aspirations for them.

Middle management needs to be more trained on the people management part.