Pros
The salary is competitive, and if you stick it out for 2-3 years you can usually collect on a decent stock package. Depending on which org you're in, they're semi-flexible about working remotely, and have great benefits. If you're a self-starter who likes to learn everything they can, you'll have plenty of opportunity to grow here.
Cons
The subjective performance review system is demotivating at best, demoralizing at worst. Raises for non-tech workers hover in the 1%-2% per year range even if you get a good review (at least in my experience working there since 2013). Also, promotions don't come automatically like they do at other places--- it's not enough to work your butt off and be awesome at your job. Even if you have mountains of data to prove you're worth the promo, you'll never get it if you're not out there shamelessly self-promoting in order to get the attention of those people whose subjective performance review feedback you need. That being said, the employees who have the best work ethics and get the most accomplished simply don't have time for a lot of glad handing, which puts them at a disadvantage when it comes to promotions. Unfortunately, the inverse seems to be true as well, where employees who are good at playing office politics and knocking beers back with their bros after work tend to get promoted left and right. There's not a lot of diversity, and women especially have to fight harder to be noticed and rewarded for the hard work they do. Not to mention there have been a few issues in my org where women have been harassed by male co-workers, but HR doesn't protect the victims--- they're told it's a "he said, she said" situation.