I had that system on a previous car. Didn't care for it. Hits the brakes sooner than I prefer if someone enters your lane, and if you're not paying close attention you'll be following a slower car for miles before you notice :laugh:
I have this on my 07 G35 and it looks like it works exactly the same way. What looks different is that I can easily set it to regular cruise control by simply holding down the On button rather than just pressing it. On the Q60, it appears you have to go into a menu and turn that feature off. That kinda sucks, but I actually like the feature - usually. My wife hates it in her JX35.