We had a great experience with Stay Unique.
They were really reactive when we needed their help. Plus someone was there to welcome us.
The apartment is very well located (5min from the metro station)
The beds are comfortable, the kitchen has all the basic ustensils that you need.
The only inconvienient is that you can't make noise after 9pm. Even when we were dining quietley at 11pm or 12am security was ringing at the door cause the noise meter turned on.
Otherwise very great experience !