I would also be interested in any feedback on this broker, I am looking for a broker to replace Cybertrader since they won't trade with UK residents and I will be moving back to the UK soon. It seems difficult to find a good direct access broker who can deal with UK residents. Have looked at IB and don't much care for their features.
Don't get me wrong JonnyT, have heard a lot of good things about IB and far be it from me to dis them. Just a personal preference I guess, have played with their simulator a few times and just can't get comfortable with it, wish I could because for me it would be the perfect choice. But I have a few more weeks so I keep playing on their simulator and who knows.
It's also worth bearing in mind that depending on what you are trading (futures, stocks etc), there are a whole load of front ends that work with IB, you don't have to use TWS directly. Autotrader, BracketTrader, NinjaTrader, ButtonTrader to name but a few