I have a pair of GT MD-6TMs which I've used mostly for MS projects. I've used them also for female vocals, on account of their warmth and accuracy.
The main advantage of using MS is that it's totally mono-compatible. Also, if you record 3 channels (middle, left, right (-left)), and mix from the 3 recorded tracks, you will have total control of the stereo image at the mix time, rather than at the time of recording.
Hope this helps
- Wil