Checkin 3:30 was not available. When we returned at 6:00 the room was still not immediately available and we had to wait 15 minutes.
The phone quality is very poor, housekeeping cannot hear us and they had to call us back a few times to clarify basic requests.
The thermostat was broken in our room. Set to 23, but it just kept going colder and colder until 19 degrees, the only way to stop it is to turn the whole system off.
When we complained about all this, they gave us a USD$5 bottle of wine (we don't drink and had carry-on luggage, so we just left it for housekeeping).
The robot was awesome.
Location is a bit far from the subway with luggage. There are no grocery-stores/bakeries nearby. Walking 15mins to Wangfujing is your best bet if you need food - but it's busy, expensive and a it touristy.
Overall - not a great hotel, not a great location, not a great experience, but the robot was cool.