We stayed here for four nights in mid-June. The room was smaller than those pictured on the listing, and certain aspects of it felt a bit cheap (ie, all in one bodywash/shampoo, a tiny battery-powered safe that didn't have any batteries in it when we arrived). However, we really liked having a 24 hour concierge, and as we were there in the middle of a heat wave, were immensely grateful for the air conditioning!
The neighbourhood is not one that I was familiar with upon booking. It's about a 30 minute walk down to the river/museums/etc, and is near some lovely cafes and restaurants if you head to the right when coming out of the door. However, the street a block to the left (towards Gare de l'Est) was quite sketchy, especially at night. As two girls travelling together, we didn't feel particularly safe there - luckily, the street the hotel itself is on was fine.