Hej-hej.
Just back from Sweden
I was able to get the card at a pressbyran immediately upon landing. I went for the Telenor Enkelt as you had suggested. There were several other brands and options, even ones with a modem included for SEK 200.
The Telenor card cost me 99 SEK, and I topped up SEK 100. So it cost me SEK 199. I called the customer service (not easy to navigate their IVR if you do not understand Swedish). The girl told me I should have gone for a different offer, as with a 200 SEK topup data would have been free. Anyway, she activated the data option for SEK 69 or so, which offers unlimited data for a month. It worked very well, coverage is quite okay, but bandwidth is limited to 1 Mbps down / 128 kbps up. It was enough for me though as I only used my phone as modem over bluetooth which in itself is also limited in speed. I tried it in a modem too, but speed was no better, so this seems to be a limitation of the card.
I also made a LOT of long calls to numbers in Sweden and sent a dozen or so SMS in Sweden as well as abroad, and I still have about 100 SEK credit valid for another year.
I did not use the card for making international calls, my home operator's roaming offer was better, but I received a lot of calls on this Telenor SE card, so it was a good combination.