Pros
Whether you're somebody who just came in to the semiconductor field or is a veteran in this field, chances are very less that you haven't heard about Synopsys already. Synopsys has the most extensive set of tools for semiconductor design and Verification the industry has ever seen. With constant innovation clubbed with smart acquisitions, Synopsys has strongly positioned itself as the leader in EDA world and with it's prestigious Intellectual property business. You will work with some of the smartest brains in the industry on leading edge foundry nodes, designs and up and coming technologies. The work culture is excellent, you get a sense of belonging in the company. Depending on which vertical group you work in, the work-life balance could range from excellent to gross mismanagement. Overall, Synopsys is a great employer who will take care of you like a family member.
Cons
As with any big company, hierarchy, red tapes and processes have made things a bit more complicated than what one would wish for. Professional growth could be slower than what you expect, given endless mid-levels to jump through before eventually reaching where you want to be.