I have a meeting at Harvard in a few months and am looking for recommendations on where to stay. Two years ago I stayed at the Sheraton Commander which was nothing more than okay. Since then, I've heard of a few bad reviews which gives me a bit of concern before I reserve again.

Does anyone have any hotel recommendations? Specifically, any recent experiences with the Charles, Harvard Square, 1868 and even the Sheraton Commander? I'll be staying three or four nights.