Pros
I've worked for RapidScale long enough to see both the pre-Cox operation as well as since the acquisition and it's been a great ride so far. I really enjoyed the company and it's culture prior to Cox, but the amazing foundation of culture that was introduced last year was really great. Benefits are above industry standard and everybody I work around is generally always in a very positive mood, even on Monday! This is one of those companies you work with for a long time. The grass is really greener here!
Cons
There aren't really any. I'd expect working under a 60k person enterprise like Cox would introduce the typical political negatives that come with that size of a company but like I said above, the culture really fosters a focus on the employee and satisfaction with their job and their contribution to the company. Nothing really "negative" to say.