Pros
The technology and the product space are both very exciting. The pay is very high for the area. No commute to London required. Company is top 3 leader in its market.
Cons
High, above average pay means executive management expect above average contribution, this is largely measured in hours. Benefits are non-existent outside of those mandated by law (the recent pension rules), share options have been offered to employees as incentives, but the scheme is informal and not open to all employees. The rules and policies change week by week as executive management change their minds, which can be extremely stressful and demoralizing for staff. The company is a revolving door of senior management and technical talent, ever changing management and team members make it very hard to deliver anything of worth, it's especially demoralizing when people simply leave work one evening, and never come back the next, which is very often the case here.