I emailed their tech support to see if the bugs people reported were actually gone. Tech wrote back and assured me bugs fixed and it works fine in El Capitan. So I downloaded and synced my iPhone Todo list. Everything worked fine but now it won’t sync to iCloud at all. So I am not going to use it.
Update: 3.0.7 requires manual syncing. Why? Shouldn’t it try to sync every few minutes?
Appleman3899 about Todo