Pros
Ibm has a flexible work environment, which helps a lot with work-life balance. Benefits are good. There are opportunities to change jobs without leaving the company.
Cons
Recently Ibm seems lost in trying to figure out their strategy. VP-level grasp at straws as they try to compete with the likes of amazon and google. They release substandard offerings. They tell offering managers that they are the CEOs of their offering, but then cut off resources with no possibility for these "CEOs" to decide how to spend their budget or resources, and enforce non-logical blanket directives without considering impact. Today most VP-level decisionmakers don't seem to have enough technical knowledge to lead a technology company - they are finance-driven and often make short-sighted decisions based on current quarter numbers, a directive from above, or nice-looking graphics used by a savvy politician to advance his career.