flyaway,
yes, the Nassau Marriott surprised me as well, considering the bad reputation it has had both here and from others I know who have stayed there.
But we went on a last minute award over winter break and I was honestly not expecting that much. The hotel treated us well as Plats and overall I was satisfied with the stay. During February when we visited, the going rate was somewhere just under $200/nt and I think that had we paid that, we would have felt like we had gotten our moneys worth.
The rooms were average, not bad and not beautiful but yes, the hotel and casino have recently been renovated. If you have any Marriott status at all, request an oceanfront room. The view alone is worth the stay.
If you do a search on the Marriott forum, you will find my more detailed post, as well as other posts on similar properties.