Pros
The amount of free drinks has already been covered. We have it, and it is a nice touch. We also have a very nice new building that really turns up the level of coolness in the company. I came into the company as a developer and am now working in project management after two years. Many people have complained about there being cliques around the company. They do exist, but all you need to do is just say "hi" to another person and get to know them. I've been seeing a change in upper management were things are starting to get better insofar as ideas filtering from the bottom up. Management has acknowledged that this is a problem, and they are actively working on it. I'm paid really well, I work from home one day a week, and my schedule can be as flexible as I need it to be.
Cons
There is some chaos when taking on new acquisitions, as can be expected. There have been some bad decisions made on the direction of software development. It bothers me that we have one main platform on Java and a few other things that are in C#. Sometimes I feel like the wrong people are making decisions, but this is nothing that I haven't experienced anywhere else.