I've been using Liftoff but Sync feels a lot more polished except what it does with the comments sometimes - showing child comments with no parent. Liftoff would show the parent comment so I don't know what's up with that.
I told my family I was going to cancel when they cracked down on our households sharing and they haven't yet. My parents are still enjoying it at their house, and me at mine.
Found out I don't see ads because I'm using small cards.