Pros
It's quite possible to be paid more than you are worth, or to coast, in some roles. The head office location is central with good transport links.
Cons
The company objective is to look like a leading global market intelligence firm, as quickly as it can, presumably so that Danson can enjoy another profitable exit. This leads to boiler room sales practices, a constant need for acquisitions to muddy the accounting waters, and a content strategy aimed at the volume and presentation of analysis, rather than its merit. Danson, and the small number of his fast-changing coterie of yes-men who survive the ride, may well succeed and cash out. But it doesn't make for a very pleasant place to work, and it's unlikely to provide any valuable career experience, whether you're an analyst, a commercial person, or in one of the back-office roles where Danson's obsession with cost control hits hardest.