I had a lovely three night stay for business, after a slightly nervy 30 minutes when we couldn't find a shower room (it's separate to the toilet room and is the door next to the smaller bedroom - it was just a bit stiff and we presumed it was a locked cupboard!). The apartments do not have a lift and it is a few flights to the first floor. Access is via a keypad to the front gate, front door and apartment door. There was no noise from outside at night, but other guests can be heard moving around the - beautiful - hard wood floors. The amenities were great, full fridge with freezer, kettle, coffee maker, hairdryer all provided. Beds were extremely comfortable.
The location was ideal for us, but is around a 30 minute walk from the tourist square - which is a fun walk and reached via an elevator that takes you from one street to the next! It is located off Boulevard de Waterloo which boasts higher end shops such as Versace, Chanel and Tiffany & Co. There's plenty restaurants, shops and bars close by.