Pros
If you're into video games, it's a cool place to work considering they have all the caffeinated and non-caffeinated drinks you could drink in a day, allow you to stay after/before your shift to play video games on computers there and it's probably the only place you'd feel alright wearing a WoW t-shirt in public. The team atmosphere is sorta neat and there's a lot of competition between teams to be the best for the week given that all reports on individuals are public. If your idea of a Christmas bonus involves free game time cards and a statue of some WoW character or you'd prefer a spectral tiger card over a raise then this is the place for you.
Cons
Sooooo, what REALLY REALLY sucks about working for Blizzard is that IF you are very serious about hardcore gaming, well then you will probably leave Blizzard to pursue your gaming, as was the case for me. I started out working there with a noob's knowledge of World of Warcraft even tho I had played Diablo franchise to death. Six months into working there I was still a temp with no promotion or perm status in sight despite my above average reviews they like to do each month, working until 1 am in the morning, 10 hour days because of their mandatory overtime policy, even helping out with extra time when their EU dept went down. I loved WoW and learned the ins and outs of almost every class of which I had maxed out toons. The problem is that if you are passionate about the game and knowledgeable, when you start out working there you work the primetime raiding hours which is dumb because they should value the good gamers over what my guildies like to make fun of with regards to some game masters who obviously don't know crap about the game and probably think *Storming the Citadel* on normal mode is real raiding. So I left Blizzard one weekend and got dragonspine trophy for my hunter which for me was better than sitting in a cubicle answering some nub's request to reactivate the lvl 10 toon he deleted. Work during primetime raiding hours for low pay and no benefits while all my friends are working are were working on M'uru? It's a no brainer and the reason I now have a better paying job along with shards for Shadowmourne.