Pros
There is free food, it is always a good name on your CV, they have nice and modern equipment and offices.
Cons
Management is very poor, anyone can be a manager or team leader without any knowledge of the product as they only need to "get on well" with higher managers and "speak a lot". It does not matter how much you know or how well you do your job, if you do not sell yourself to managers and praise them, you will not get anywhere. A lot of people I know are being bullied at work, having work not being recognised, suffering from too much pressure and a huge work overload, always being told off for the smallest thing even if Management have no idea what their product is about. Too much control and too much micromanagement. Absolutely no work life as everyone is dead tired by the end of their shift (expect minimum 10 hours). Huge turnover, with people leaving every single month, nobody wants to stay. The atmosphere in the office is tense and unpleasant. Avoid at all costs.