I stayed for 5 nights in Elitzas place with my husband on his work trip. The location is perfect, walking distance to the Arc de Triumphe. Loads of good restaurants and an easy metro to all the sights.
The apartment was cozy and clean. The bed was good, the refrigerator was clean, and they even left a small bottle of red wine and some glasses out for us.
There were no rats, no surprise fees, or anything of that sort. I highly recommend staying at Elitzas.