Pros
Flexible time tables, social benefits for employees.
Cons
I worked in Telefónica Learning Services (now Telefónica Educación Digital) for 13 years. The basic cons is that they have absolutely no respect for basic human rights: Giving opinions, communicating any personal point of view and choosing with who you want to have lunch was absolutely controlled and punished in case of doing something considered inappropriate (not only when talking to clients or external people, but between employees inside the company). I was under strict surveillance, obliged to work over the workday for more than 3 hours a day and obliged to work when being sick at home. Anyone with a special talent was punished if he or she was too brilliant and only mediocre silent and acolytes to the personal interests of bosses had the chance to be left alone. I had the chance to continue in the company, but I decided to quit, as my basic values were being assaulted.