I just got my 320D remapped at Kempower, they did a great job! from 163Bhp to 205Bhp and from 347Nm to 435Nm! He told me my engine is in fact still under performing, due to the poor diesel quality I'm using (most Belgian diesel is bad according to them). He agreed to test it again on thursday after I fill up on some other brand of diesel to see the difference.
But I can assure you even now it's a completely different car to drive!!!!