Pros
OCLC is going through some changes and faces strategic long term challenges. New management is trying to find it's way through, somewhat imperfectly. Having said that, it is still a really good place to work if you shuffle 1's and 0's around for a living. The work's not so hard that you don't have time to read up on new technologies, so if you are disciplined you can keep current. This is a place for the technologist who wants to invest in learning about Library Science and is playing the long ball. If you are a rock star then please, go consult and spare us the "new framework of the week".
Cons
Right now the organization is in flux. If you can't deal with changing priorities and management uncertainty without developing a Malox dependency, then maybe there is a better position for you with state government or a bank. But if you are curious, willing to invest time in learning library science and can approach managerial thrashing with bemused detachment then I recommend working here. I know I enjoy it. And if they do right the ship, it will be all the better a few years from now. If they don't, there are plenty of IT jobs in Central Ohio believe me.