Have to say I always drive with mine turned off. I find it too intrusive coming out of roundabouts, I find my right foot is a far more effective method of controlling the power
Also, I've had it leave me stuck coming out of junctions in the past, a little bit of slippage and it engages and kills the power, so I have to wait before I can get out the way of the on coming cars!!
Again with the also... if accelerating say up hill, and you go over a small hole or maybe a man-hole cover and a wheel looses grip, it kills the power!
I just find the whole ASR system really annoying. So as I said, I usualy drive with it off