Pros
The company actually gives a damn about how comfortable you are at work - gym, massage, good insurance. Office culture is very pleasant, the majority of colleagues are able to sort even the most unpleasant crisises with certain amount of professionalism and detachment from emotions (so your percentage of shouting hysterical people will be a tad lower comparing to other workplaces).
Cons
The first unpleasant thing you'll encounter is the salary you've agreed upon while negotiating the position will be divided into 2 separate portions, the first one (60-80%) will actually be your salary, and the rest (20-40%) will be paid (or not) if your management feels thing's going good. Which is especially weird if you're working in engineering role and don't have sales performance KPIs. This isn't being discussed during the interviews, so it's the surprise you're face with while accepting the offer or in some cases while signing the documents on your first day. Be prepared to the fact that almost no one in the company is actually responsible and accountable for anything (be it technical results of sales forecasts). This means that other than a few people who actually care for their domain for their own personal reasons it would be actually almost impossible to make people do their jobs well (or at all). If something bad happens - there's slim chance to none that any lessons will be learned since almost no one works of improving business processes in all of the departments.