The check-in time of 4:00 pm is a little late. Our experience turned sour because the apartment was not cleaned when we arrived and hence we were unable to check-in at 4:00 pm. Inspite of going out to look for things to do while apartment was supposedly being cleaned after we contacted the host, (via international call as we did not have a Taiwan SIM card) when we returned to check-in about an hour 15 mins later, it was still not cleaned up. Nothing was done. We had to contact the host again (another international call) and then stand around the corridor to wait while the apartment was finally being cleaned. All in, we checked in only 2 hours+ later from the agreed check-in time of 4:00 pm.
Advice therefore for future visitors is to go earlier to check on the readiness of apartment.