I recently stayed at the Paris Marriott Rive Gauche over a weekend and put a video overview together of the hotel, plus the junior suite. So if you'd like to *see* what the hotel and rooms look like, check it out here:
http://yelloww.net/blog/2010/01/pari...t-rive-gauche/
Most of the details of the hotel have already been covered in this thread, so I won't repeat them, but I will say that the concierge lounge was definitely one of the better Marriott lounges that I’ve been too. Yes, no hot breakfast, but at dessert time every evening they always had delicious French pastries, and even provided breakfasts on weekends.
Would definitely recommend this hotel to other travelers to Paris. Check out the video for all the details.