Fantastic modern apartment, right in the heart of Paris (1st Arrondissement) with great transport and tourist links (5min walk from Louvre and RER station). Wifi connection was unbelievably fast along with a great SONOS sound system throughout all rooms. The apartment was spotless, with daily cleaning of all towels, bedding, and amenities.
The check-In process was also very easy, with an online portal to enter your details before you arrive for extra convenience. Also, communicating with HighStay staff was very quick and easy (through AirBnB or WhatsApp), helping with simple questions about the accommodation.
I have absolutely no complaints about this stay, and would highly recommend this for anyone looking to stay in the centre of Paris for a few nights.