Hallands Stugcentral AB
Only used them because a friend recommended. We needed to rent a house for 12 nights during the Tall Ships Race, they charged us for 2 weeks and wouldn't consider a discount. Claimed we hadn't cleaned up when we left--we actually spent three hours cleaning--then tried to charge us another SEK 1,000 for this. Very naughty!
Checking their reviews would suggest they're not the best choice.