My husband and I just got back from our 6 night stay. We had a great time in Paris and during our stay at Arioso. It is close to the metro so you can get to all the Paris landmarks quite easily. You can also walk to many of them. Shopping is closely - high end, reasonably priced and touristy shops for souvenirs. Also, Arioso is close to the Roissybus stop near the Opera (direct shuttle from airport to central Paris for 10EU) - the stop is about a 15 min walk to the hotel or a very short cab ride or 2 stops in the metro. Arioso's concierge and staff were very helpful - even before our arrival, they made reservations at the restaurants we wanted to dine at and made recommendations for us for a few places as well.
The only downside was the size of the room - it was tiny! We had a double bed (actually 2 singles pushed together), a small table, 2 closets and tiny bathroom. So no dresser for clothes which we found a bit challenging. The tiny bathroom was actually pretty functional - the tub was a good size to soak in after busy days of sightseeing and shopping.
We would stay here again in future trips to Paris - although we would likely pay a little more for a larger room.