I like this app. I did have a little problem with the initial setup, mainly because I had difficulty understanding the poorly worded documentation. After doing numerous online searches, I discovered that to connect via wifi I needed to launch the SyncMate app on my Windows Mobile device. Then either select "Allow All" or add the IP address of the Mac I was syncing from.
SyncMate has a nice option to Clear the contents of your mobile device Contacts, Calendars, etc. Then you can do a one-way install from your Mac to get a clean initial loading of your data. That's a LOT easier than deleting your duplicate Contacts one by one.