The configuration of Wise-Sync is very straight forward.
There are some more involved steps for implementation within ConnectWise itself, however we have this all documented to make it easy for you.
If you get stuck, we do offer configuration services, to view the documentation click on the below link:
http://kb.wise-sync.com/knowledgebase/articles/204847
As our service is operated from within Australia we do have to charge GST no matter where our customers are located.