It's possible to check in 1pm or late in the evening during the weekdays. Weekends are more flexible. Just ask about the possible check in time!
Great location in trendy Kallio close to all the services and bars. 200m from the tram and bus stop (where the airport bus 615 also stops) and 500m from metro.
The apartment is oldish but the location is great. Please notice there's no wi-fi but there's a cafeteria opposite of the apartment where you can use wi-fi.