Pros
Access to high quality infrastructure and resources, the cache of working for a "top" institution.
Cons
A management culture that prefers to suppress complaints rather than investigate them, and is happy to let bullies thrive as long as they are "productive". For all their kind words, if you go to them with a complaint management will work behind the scenes to make sure nothing happens - a typical tactic is to wait so long that your legal options have been timed out. Academic management have an excuse for being useless - they aren't trained in management. But Human Resources have no excuse. They know exactly what they are doing. Some of them are malicious and seem to take pleasure in the pain they cause. This is an institution who has an employment lawyer from one of the most expensive legal firms in the country (the Queen's solicitors) on retainer, working on site one day a week. And they make full use of them. The lawyer isn't there to help Imperial stick to the law. They are there to help them get away with flouting it.