This terminal hotel is right next to the domestic exit at Helsinki Airport.
The location is excellent.
The room is in a rather awkward location, right next to the front desk.
The room is also very small, with one single bed, a sink, a shower booth, and no space to open a suitcase. It's very small, but it's enough for someone who just wants to sleep.
I arrived at the airport late at night and checked out early in the morning, so the size was enough for me.
By the way, check-in is done automatically by machine.