Works perfectly for calling other SIP clients AND calling land-lines or mobile phones. The latter obviously requires a subscription at a VoIP provider.

As simpe to setup as any VoIP software (that is, requires some input, but not really difficult), works very reliably, really good sound quality! In other words - a perfect telephone.

Now I just pray for Address Book integration, as well as perhaps a menu-bar utility so I do not have to see SJPhone among my running programs.

Oh - and perfect price, too :)

/S.

P.S. Danes looking for VoIP providers and config info, should look no further than Musimi.dk.