Self-service, Omena Hotel Helsinki - Finland Holidaysbr This is a self-service hotel that we tried in Helsinki. It is very unique - everything is provided but it is DIY. On the day before you arrive, we received a code that will open the doors to our rooms, and the main door. Sleeping is in one area, while the sofas and tables are in another. However, the check-in time is 4 p.m. or after, which is a bit later than usual. Give it a try. Recommended.