Pros
It's hard to find any pros. A few years ago this was a great company for employees but those times are over. What's left are the nice locations of the offices and a great mix of colleagues if they are still around.
Cons
Unless you are looking for a position in London you will feel like abandoned by upper and middle management. People are leaving left and right, almost on a weekly basis. Most of the talented people outside London are gone already and nobody cares or does anything about it. The company is still not doing well and is fighting a lot of client churn, which is understandable since the products are not working well even though the general idea behind them is good. Bonuses haves been paid late almost every time with no clear communication beforehand. In my team we felt very limited to our defined roles and did not see possibilities of future improvements regarding our professional or personal development. Also, every pay slip mentions a deduction for employee training sessions, but we never got a single one. Staff motivation is very low in general. People do the bare minimum and take their time doing so because of lacking leadership roles and clear visions.