I've stayed at the MO a number of times because our corporate rate is similar to what you describe and the hotel has become my top choice in Paris. I agree with what others have said re this being a no brainer at that rate. The modern aesthetic is not for everyone and they are in the process of planning a refurb. Also be aware that the lowest category rooms are tiny and the next category up are not necessarily much bigger even though they include a bath tub. The size of a room within the same category can differ a fair bit. If I recall correctly, larger rooms in the Deluxe category are on the left side of the courtyard. The service is very good, although the concierge isn't particularly strong. Breakfast is excellent and eating in the courtyard during good weather is really enjoyable. The gym and spa are ok. You can't beat the location.