Originally Posted by
RSVP
The $25.00 at time of booking is gone, it's now at check in based on availabilty.
It is still available at purchase at time of booking on the Midwest Airlines site.
The Midwest site is going way, however it is still around because some functionality is not avaialble on the Frontier site, such as accessing your reservations if you've got a YX account instead of an F9 account.
The ability to upgrade to Stretch ahead of check in might die with the Midwest site, but it might be something still coming to the Frontier site.