Good - A few days after I joined I decided I wanted a much bigger monitor and several gigs more ram. After hemming and hawing for a day trying to figure out how to justify it to my manager, I just asked. My manager said there was no reason to ask him, just file a ticket. No approval needed. This is true for anything I need (hardware, software, cell phone...).
Bad - Within my first week, I noticed three "good bye" emails, none of which were voluntary.
Great - I have free access to one of the largest sets of voluntary enjoyment decision data and lots of big machines. ML paradise.
Great - All of my coworkers are amazing. It's really satisfying to not be the smartest guy in the room.