Check in is time-triggered at exactly 3 pm so there were a number of other guests just waiting outside the house; so I think checking in early is almost impossible. This accommodation is also handled by an agency so you won’t get very personable replies like some other airbnb listings.
The place was decent but ceilings and walls are very thin so even without talking, the moment someone upstairs or downstairs walks, you can hear it — as a light sleeper it wasn’t great but I guess the price and location makes up for it.