Pros
IronPort retains a ridiculous number of of bright people, providing a largely idiot-free workplace populated with people who aren't interested in stepping on others' fingers as they climb the corporate ladder. It is, by far, the most collegial atmosphere I've ever worked in.
Cons
Engineering seems to reorganize randomly; it's better than it was only about half the time. Reorg decisions are made at the highest levels, and apparently don't take lower-level managers opinions into consideration.
Additionally, the CEO has become more and more absorbed by Cisco; it's apparent he's losing touch with his roots. I suspect he's getting pressure to integrate more, but bringing the best Cisco management into IronPort is lowering the average IQ of both companies.