Pros
CC is the proverbial gorilla in the UK channel - if you want to be involved in some of the biggest business deals that there are to be done in the UK, you'll likely end up here in your career at some point. There are some good people across the organisation, particularly in the vendor management teams, but there is a real feeling of having to play the corporate fiddle to feel included in the organisation. I'd say pay is in the middle end of the market, but make sure you get a locked down target very early in the year, and clarity over your commissions schedule or it becomes a moving part of your plan very quickly especially if your face doesn't fit.
Cons
I wouldn't say people are particularly empowered to do their job - their is a CC way of doing things and if you try to be innovative or challenge the norm, you won't last long and will quickly be seen as a nuisance or outcast. The cliquey dinosaurs in Senior Management have all become very wealthy over the years doing things their way, and so don't expect a modern tech company culture or benefits.