We stayed at Clara's appartment for 2 nights/3 days, it's location is fantastic, the Marais neighbourhood is one which is much less touristic (not a lot of hotels), which is a big plus for us.
The appartment itself is cosy and everything was perfectly OK (sheets, towels, ...), the bathroom was very small (which is normal in Paris).
The only remark is that some lights didn't work correctly and above the shower, there's some mold.