If you travel using points for this hotel, it's a nice enough place -- but most significantly, be prepared to walk past a lot of sketchy people in the park to get here. But for the nightly police car and several on-duty officers in the park that you must walk through to get into town, I would have been worried for my safety.
For the positives, everything is very new and clean. Great maid service. Very helpful front desk staff. And a fleet of nice new cars out front for hire (getting a cab in Montpellier can be extremely difficult -- so this is a big plus if you anticipate needing a hired car). the room I had was exceptionally quiet... but it was also hermetically sealed and the windows would not open. The minibar is a plus.
For the negatives, the hotel has an odd and almost creepy Asian theme. The gym is only a couple of bikes and a couple of treadmills in a windowless room. The pool is unheated.
With respect to the other chain hotels, I think that the Pullman is in a better location. Colleagues stayed in the new Courtyard and liked it.
If you are looking for charm, stay at Le Guilhem.