#3
Everything was perfect. The hotel is close by the city center. It has a bus stop (incl. the airport bus), a tram stop and a metro station right in front of the door. A supermarket is right around the corner. The room was clean, quiet, it had a TV, complimentary WiFi with decent connectivity and speed, and a bed of decent size. It didn't have the best view (to the backyard), but I prefer quiet rooms over ones with splendid views. The bathroom was very clean and the shower worked perfectly. The breakfast buffet covered all sorts of desires (British, continental, gluten-free, vegan). Although the breakfast room was occasionally a bit crowded, because the hotel seems to have been fully booked during my stay, the buffet was continuously re-stocked and would serve everyone. Moreover, you can enjoy your breakfast with a perfect view over the Hakaniemi market square and with sunlight upon your face (on good weather days; which is rare enough in Helsinki).
The staff was extremely helpful and friendly, especially after I locked myself out of my room and had to get another key-card. I would certainly recommend this hotel to colleagues and friends.