I made my first flights with my S2 and 2 + beacon.
First flight was with my iPad and beacon and was pretty bad, lots of wandering and disconnects. I tried beacon only and that was worse I couldn't get a GPS signal without connecting to the iPad.
Third flight with my iPad was great, like the old days it tracked very well and never went GPS only.
So far my results are mixed however it seems to be learning and getting better I will report back when I have more results.