Erik's place is a wonderful place to stay in Stockholm, the price is incredibly reasonable considering how much space you get, and it's a really pleasant space with lots of art and plants. (One thing to note is that there are no doors between the living room and bedroom, so if you are sharing, make sure you don't mind them being able to see into your room)
Location is obviously not that central, but it's a short bus and train in and you can even walk down along the waterside to the bridge to sodermalm.
All in all, would definitely stay again. Erik was very attentive and polite, great host.