We had a wonderful 3 nights at Isabelle and Olivier's Loft apartment. The accommodation was very warm (necessary as the weather was icy cold), clean and well-equipped. The shower was spacious with lots of hot water. The mezzanine ceiling height is low - but that is clearly flagged in the apartment description and we coped without much difficulty even though one of us is over 1.85 metres tall.
The location was superb - very close to the metro and the RER stations which were essential to our trip. We were also able to walk easily to the Musee d'Orsay and the Musee du Moyen Ages - both excellent museums.
Isabelle and Olivier were very considerate and friendly hosts. On their recommendation we ate at two local restaurants. Polidor on the Friday night - fab atmosphere and great food - but don't leave it too late as it's very popular and people were queuing by 8pm. We also ate Sunday lunch at Bouillon Racine - more delicious food and a glamorous setting.
The streets around the apartment are packed with touristy cafes and restaurants - and crowds of people in the evening but there was no street noise inside the apartment - a real plus for us. All in all - a great place to stay, lovely hosts and we enjoyed Paris in all its winter beauty.