Probably a little underpowered most of the time with 5.8.
I thought the wind had died and then had my 2 fastest runs for the day, I still didn't trust that it wasn't going to disappear so called it a day.
This feature is only available for Premium members. If you are a premium member make sure that you are logged in. You can upgrade to premium member by selecting the DASHBOARD menu item and choose for Premium member.