Stayed for four nights in July.
Transport - Had a car which was helpful. However, we (family of 4) also used the Metro. The nearest stop was about 4 blocks from the hotel. I don't have my map in front of me but I would say it was North of the hotel (what I considered to be the "back" of the property). It was just a few short stops to almost anywhere. If you are a good walker (10 long blocks?) then the Arc is walking distance.
Accomodations - We had what they call a suite. It was only slightly more expensive than a regular room. It was very large (especially based on my other experiences in Europe) with a separate bedroom, refrigerator, microwave, etc. We were very happy at this property.
Staff - They were nice but they knew very little about anything outside of the hotel. The neighborhood is residential, but there are lots of banks, markets, restaurants, etc. if you walk toward the Metro stop I mentioned previously.