Ventajas
To get a financial services company on your CV. The dev team at least tries to operate in an up to date manner. Some of the great people I met that left as equally fast from their dead end roles.
Desventajas
The company was a terrible place to work from the start, from the London office facilities through to the attitude of some of the longer serving staff. It is like the graveyard for people that had given up on their career and settled on a job for life. New ideas are frowned upon as the staff has worked there 10 years and simply want to show up, get paid and go home at 5pm doing the same thing day in day out. None of the older staff are interested in furthering their skills or career or building a cv. The company has a 2 day website downtime at weekends as the IT Operations staff have weekend double time written into their contracts so they don't want to lose the 4 pay outs of the year for the 4 releases they manage by automating what they do. The test team can't write automated tests and they operate a scrumafall delivery cycle that just doesn't work.