Since I haven't seen any information about DCF in Sweden in this forum, I just wanted to start a thread to my experiences and invite others filing in Stockholm to join in (or anyone, for that matter).
My wife (USC) and I (a Swede) were at the US Embassy in Stockholm yesterday, where she filed an I-130 on my behalf. We got there just before 9 AM, when they open, and after going through security we found 25 or so people waiting. Most of them were there for either nonimmigrant visas or citizen services, though, so we were first in the immigrant visa line. After waiting about 5 minutes, a woman came to the window and took my wife's name and told us that we would be called when it was our turn.
We waited a few more minutes, and were called back to the immigrant visa window by another woman. My wife handed over our papers and was asked a bunch of questions, mostly straightforward stuff, to clarify the history of our relationship. When she had gone through all the documents, we were sent to the cashier to pay the $420 filing fee. We then had to sit down and wait for about 10 more minutes before my wife was called to talk to the consul, who asked a few questions and then approved the petition on the spot. All in all it took about an hour.
Considering how nerve-wracking it can be to be scrutinized, the overall experience at the embassy was great. Everyone was calm, friendly and professional.
We got our checklist of documents for the DS-230, some of which we have obtained already. Judging by other people's experiences, the 1-864 seems to be the biggest obstacle to overcome. We intend to use assets (savings + my yet-to-be-sold apartment), so any tips about things to keep in mind are welcome.
