Pros
Best reasons, I could go on and on. We are surrounded by the smartest, nicest, friendliest colleagues. Management is open to suggestions, trying new things, running different mini-competitions to keep it entertaining. Ongoing training, clear pathways to advancement, lots of people advancing to completely different teams if they decide they want to go in a different direction from their initial position with Meraki. Quotas are fair with room to overachieve. New people are quickly welcomed, and the people on my team have become some of my best friends. Stocked fridges, beer on tap, sweet Public bicycles for Christmas for everyone, rooftop garden/bbq with an amazing view and catered lunch every day - these things don't hurt either.
Cons
Our CEO has stressed the fact that he negotiated with Cisco to keep the culture as it is, keep the fun times rolling, but still the future is uncertain down the road as we integrate further into Cisco. So far nothing has changed though -- at least, not anything that affects me.