I’ve stayed at all of the GLO hotels in Helsinki, and highly recommend any of them, the Kluuvi one is my favorite.
I’ve never actually stayed at the Hotel Kämp, but it’s gorgeous.
I’ve never stayed at Lilla Roberts, and I like the locations of the other hotels a little bit better, but all of my friends who have stayed there have truly loved it.
St. George is a pretty new hotel, and I’ve heard a lot of friends going there for the spa, and can’t wait to visit there myself one day.