Travelers beware!! I would like to give this flat and host a five star rating, in fact, I waited as long as I could before I made this review hoping that Sylvia would make things right, but it seems that is not going to happen so here we are. First, the flat is nice, the location is nice. There seems to be some mold growing in the top corner of the shower and it is rather warm in the flat as temps increase with spring/summer. Neither are that troublesome especially since you know from the description that there is no AC in the flat. That is where the minor inconveniences end. Check in was relatively easy, our train was late so we were unable to meet up with our hosts to check in. I messaged them the entire time to keep them informed about our arrival but Sylvia still seemed rather put off by our lateness. It couldn’t be helped on either end, so I just chalked it up to minor aggravation. Next, we could not get the Wi-Fi to work, the networks and password we were given in the Airbnb app as well as in the welcome binder did not work. I messaged Sylvia several times over the course of a 24 hour period and I received no answer until the next day. Her answer did not solve the problem and we decided to just let it go as we were going to be leaving in 2-3 anyways even though my fiancé needed the Wi-Fi. And then finally, the morning we go to checkout, the locks in the door would not turn (you have to use the key to enter AND exit the flat) and we were stuck in the flat. Within 10 minutes of not being able to get the door open, I messaged Sylvia who attempted to find someone to come let us out, when she could not find someone, she then called a locksmith. It took over TWO HOURS for us to be let out of the flat. There is no secondary exit. If you can not get out the front door, you can not leave. You’re not on ground level, there is no ladder, you are effectively stuck. Not only does this create a terribly dangerous fire hazard, but it also caused us to miss our train to Switzerland. While messaging back and forth with Sylvia, she acknowledged that this has happened before to another guest and instead of replacing the locks/door, she put a can of WD-40 in the flat. She swore that she would call us a taxi when the locksmith arrived (and that she would reimburse us so we could attempt to make our train), she did not make the call and despite promising to reimburse us, has yet to do so. In addition, we would have arrived to the train station roughly an hour and a half before departure(tickets/website suggests being there about 30 minutes before) before we realized we were stuck and since we couldn’t get out for a problem she acknowledged had happened before, I asked and expected her to cover the cost of our replacement tickets. When I booked the original tickets I paid $95 US dollars. To rebook on the next train cost me €238. Since leaving Paris, Sylvia has ignored practically every message I have sent and has yet to accept my refund request. Between the taxi and the new train tickets we were forced to pay for, we are out over $300 for something that was 100% not our fault and a known, acknowledged issue by the host. I can not recommend this flat or host to anyone as it is potentially both dangerous and costly.