I've had quite a lot of disgruntled IBMers sitting in front of me recently. Sounds like morale is fairly low - the PWC transition hasn't gone too well, and the company is experiencing wider problems, as you've probably seen in the press. Having said that, IBM are spending a lot of money in the media making sure that everyone knows the BCS are not affected by the recent changes. If I were you, I would take the chance - even if you only stick around for 2-3 years it will be good exp and will look great on your CV. Good luck...