I’ve been fortunate enough to have been on the beta since mid-December and my setup (Kickr, ANT+ dongle, Surface Pro 3) has been very stable, across 783 miles. I’ve had maybe 5-6 ANT+ dropouts, with only one of those above 10 seconds or so. Apart from that it’s been great.
I got set up for a nice Friday nice ride but noticed pretty early that the whole list of riders was jumping all over the place, from showing all to just me and everything in between. Worse, riders I was alongside were jumping back and forth, disappearing and going from 10 metres behind to suddenly well ahead of me. The system wasn’t overloaded (the max I saw beneath the rider board was “13 more”).
I ended up giving up after a single lap since it wasn’t stable/useful at all. That’s the first time this has happened to me. I have a long ride lined up for tomorrow, so fingers crossed