What is S-Card?
We stayed here one night, we were going to the Helsinki-Vantaa airport in the morning. There is only about 7min train transport between the hotel and the airport, because this hotel is located next to the Tikkurila train station. Trains go in every 10 mins. The hotel offers also an early breakfast, which is available till the "proper" breakfast. We had the early breakfast, it included bread, juices, fruits and coffee, and they gave me gluten free bread (I told the staff about this beforehand).
We really liked our stay, and we definitely go there again when we have an early flight from Helsinki-Vantaa, or we go to explore the science center Heureka :)