Pros
They work on a lot of very cool projects. A chance to do great things.
Cons
Lots of infrastructure and organizational roadblocks. The major is IT. You may be issued an older computer, perhaps with issues. Need something ergonomic or to improve efficiency? A lengthy special request process. Call the help desk for anything even mildly complex? Either they probably don't know or might guess wrong. Worse, you'll sometimes wait and wait while they try to look up the answer. If they find it, probably wrong or outdated. Sharepoint team sites usually very slow, lock up documents, hard to find things. IMO too much attention to dashboards and frills. Often network outages and security blocks. I've never worked in a place with so many IT service disruptions. Applications go down frequently. File storage won't always give you back your files. Projects can drag on or run aground. An IT "housecall" can take forever. This is a constant drag on productivity and genius. I'm exhausted just thinking about it.