Pros
You'll learn how to work in a toxic high pressure environment and you'll learn what not to do or how not to run a company. If you really hate your weekends you belong here because you won't even get to enjoy it! I'm kidding there are no pro's in this company except for the fact that people get fired too often so you might see someone you don't like because of the toxic environment get embarrassed but guess what, you're probably next.
Cons
Work overtime with no benefits, get yelled at for everything and never get praised. Makes you work late and even work on the weekends. Socially awkward CEO who thinks sharing a drink because he buys it makes you friends. You get forced to work on weekends but when you asked for time off you end up getting penalized for taking that time off (or you don't actually have time off because you're working).