I do like this app, but there are currently two issues that stop me from getting it.
a) Duplicate entries. In the case where a local contact is also on FB, it creates two entries. I know there is an option to hide one of these, but this also means you lose half of the contact details. It should be possible to merge these, no?
But more importantly
b) Ads and I'm not talking about the banner ads (although would prefer an ad-free version - paid for, of course). The issue is the added icons linking back to your other apps. Fair enough if these were in the about page or something, but remove them from the menus. It just ruins the clean look of an otherwise excellent app.
If you made a fully ad-free version and found a way to deal with linked contacts, I'd be more than happy to pay for this app.
Had a HTC HD7, but upgraded to a Nokia Lumia 800