Seems a very useful feature. I'm always a bit wary of this sort of thing because programmers tend to be so convinced their great idea is the best way that they force it on everyone rather than making it optional. This happened recently with the Arduino IDE's change to a new editor. All of a sudden it automatically adds closing brackets, even when it's completely wrong to do so. There's absolutely no way to turn that feature off.
Even when a new feature is optional I think it should be disabled by default, keeping the behavior of the program consistent across versions. I don't want my UI to change just because I updated the program. This seems to happen frequently even with otherwise great programs such as Mozilla Firefox and Thunderbird.