Pros
Used to be a fabulous company when the founders were around. They believed in the vision, and maintained the hungry startup culture. People were more than happy to prop up and support others. The company was scrappy, and good people were recognized for doing a good job. Fast forward to 2016/2017. Super inexperienced managers were promoted for good individual contributions. They weren't promoted because they're good at developing others. Problem is, they don't have the "for the team" mentality, but are way more interested in self promoting (like in any situation, there are some exceptions). These managers are afraid of letting their directs shine, so their directs work like dogs and don't see any recognition for the effort. Unfortunately, this mentality seems to start at the top.
Cons
You won't see the excellent leadership, well thought out decision-making, recognition, or career advancement opportunities that you might see at traditional Cisco either. The snacks of a startup environment are still around, though slowly dwindling. The office is in SF, which used to be a perk for a tech company, but that is changing too. Don't waste your time here. Look for another startup with great leadership, or go to a big company that has been tested.