Maybe it is a bit daft in roundabouts, but if you have it set to X mph and you manually brake for a roundabout, and then when you need to go, you press resume, atleast i will not accelerate like a bat out of hell until you cleared the roundabout.
My guess is though, that it is not that it knows this is a roundabout, but the fact that the steering wheel is not "dead ahead". When i exit the roundabout and go straight ahead, it will pick up speed until it reaches the CC speed selected.
It IS a bit cautious with the speed, and a bit slow to exit the roundabout and pick up speed, but it does actually work, so you do not even have to touch the accelerator.
Another thing i like about the car, is that it seems to display "Real speed".
This is the first car i ever owned, that seems to go at the speed the speedometer says. All of my previous cars have always shown 80 kph, but GPS said 75
This is pretty important if you use the intelligent speed assist, and the car sets the speed to whatever is on the signs it reads.
In my old car i always adjusted the CC to 86 kph on 80 kph roads, this way drove 80-81kph in real life.