Pros
Thanks to Darren Jer and James Sinclair, MarketFactory has a well thought out and clearly articulated business model: hosted eFX connectivity. This focus is, or should be, a huge strength. MarketFactory has done some good work to deliver against this model, particularly on the infrastructure side. In the last 18 months, a great deal of work has been invested in addressing organisational and tech. debt issues, making for an extremely busy, but much more rewarding work environment. Darren has invested his entire future in MarketFactory - it is not just another job for him. He cares deeply about the company and is committed to it's success with a passion. That's pretty rare. Don't be misled by other reviews. Darren is not a "tyrant".
Cons
Technical debt - reliance on Customer-driven development lead to a great deal of effort being devoted to peripheral software features, with patchy coverage for core/fundamental functionality. A historical lack of engineering governance greatly exacerbated matters. A lot more hard work awaits. You need to be very disciplined in order to be able to manage work/life balance properly.