I recently got myself a Zoom H2n which I'm using for general recording purposes. It has a build-in mid-side recording feature along with normal XY stereo recording. From what I can read, there are only advantages to using mid-side recording. It's 100% mono compatible and it makes the stereo field easily adjustable in editing. The only disadvantage seems to be the inconvenience in setting up the microphones and decoding the signal, which is pretty much a non-issue with the Zoom recorder.
So are there any disadvantages to mid-side recording, or is there any difference at all? Are there any situations where I would be better off switching the Zoom H2n to XY recording mode instead of mid-side?