In stark contrast to dana's claims:
The Swedish gov's own enquiry into the sex laws in 2011.
Street prostitution reduced by half. This reduction may be considered to be a direct result of the criminalisation of sex purchases. In a comparison, we have noted that the prevalence of street prostitution was about the same in the three capital cities of Norway, Denmark and Sweden before the ban on the purchase of sexual services was introduced here, but the number of people In street prostitution in both Norway and Denmark subsequently increased dramatically. In 2008, the number of people in street prostitution in both Norway and Denmark was estimated to be three times higher than in Sweden.^
Furthermore, there is no evidence that prostitution has been pushed underground:
there is nothing to indicate that Internet-based prostitution has increased more in Sweden than in these comparable countries (Denmark & Norway). This contradicts the idea that street prostitution has simply changed arenas to the Internet. With this in mind it seems reasonable to conclude that the 50% decrease in street prostitution that has occurred is a real reduction of prostitution in Sweden, and that this reduction is probably primarily an effect of the criminalisation of sex purchases.
I would also take issue with dana's claim that only 2 people have been prosecuted.
eight out of ten cases in which buyers of sexual services are prosecuted involve situations in which the buyer has admitted to the offense. When suspects admit to an offense the prosecutor does not generally bring legal proceedings; instead a summary fine is imposed. The majority of offenses that have been prosecuted were committed in the three metropolitan areas. All of those prosecuted between 1999 and 2008 were men, with a median age of 43.
Source