Google

Interesting and complex stuff to work on, at Google scale. Talented engineers to work with. Very flexible schedule, awesome perks, etc.

Somewhat random promotion process, flawed interviewing process (no known alternative there). I referred a lot of very good candidates; only one was eventually hired.

Many managers don't spend enough time paying attention to their direct reports' careers. You don't just decide last minute you support somebody for promotion; you help him/her plan six months ahead for that, so that when the time comes, he/she is well-positioned.