Join Date: Aug 2011
Location: Sydney, Australia and Stockholm, Sweden
Programs: VA Platinum, SQ Gold, TK Gold, Hhonors Gold, Accor Plus Platinum, Bonvoy Gold, Radisson Premium
Posts: 1,022
As others have said the SK lounge is after security but before immigration. In fact it's almost directly opposite the immigration counters. I've never experienced a queue at immigration but I'm sure that depends on your time of day.
The SK lounge is typical Scandinavian - functional, clean and ordered but F&B-wise nothing to write home about. There are showers.