Just upgraded from a Series 6 LTE to the new Ultra. So far, WOD is working great and looks beautiful on the screen. Finally feel like I can do my runs without both an Apple watch & Garmin! Looking forward to using WOD & the Ultra for the Chicago Marathon. I think the app will be almost perfect once AOD is available. The only race feature that I'll miss from a Garmin would be the PacePro feature or using a GPS route to grade projected finish times or +/- to goal. I've noticed in other comments that it's on your list and will be looking forward to the addition down the road.