Pros
I initially worked for a company that was bought by Ericsson, most of us from creative rather then corporate backgrounds. A few of the perks were - modern offices - flexible work hours - working from home - good, relaxed atmosphere, surrounded with fun people from different backgrounds and countries, very international - paid overtime
Cons
For a communications company the internal communications are beyond bad, finding any information in a jungle of acronyms that nobody knows what they stand for is rather untransparent and difficult. - being from a creative/media background there isn't many options for moving up in the company - shockingly low salaries/no salary increases/no bonuses (in the UK at least) - high staff turnover - a lot of offshoring and redundancies - HR is slow and unorganised, hard to find information - poor IT infrastructure, you're not being provided the necessary tools to do your job properly and getting anything fixed is a lengthy process - the employees aren't shown enough respect or that they are valued by the company