Overall the stay was great, and if I am ever back in Stockholm I would definitely consider booking this location again, but maybe a different room. My only complaints are this room sits right above the door to the building, and the door to the building is kinda loud when it open/closes so a few times it woke me up. Also the window is kind of weird, you can't really open it so sometimes I'd get back from being out and the room would be a bit warm and I couldn't have the window full open to let the cold night air in. However, the street noise could be a little bothersome in the early evenings, but late evening it was nice and quiet. So not huge issues, just bring an eye mask and maybe some ear plugs. The fan in the room definitely helped with the noise/temperature issues enough to where it wasn't much of a problem.
Otherwise, everything is great. Check-in is super easy and William and Co are very fast at getting back to you with anything.