I'm curious how this compares to the current software version. My daughter, who is 6, has been using Dex since October 2013, so she has the adult receiver. Technically I could download the 505 software and use it, even though it's meant for adults only (since that's what the trials were on and what was FDA approved).
The one problem we have with the Dex is when she goes low, as in 40s or 50s. If the Dex goes that low, it takes FOREVER to catch up to her actual BGs as measured by a finger prick (can be up to an hour to catch up). Dex has been nice to have to see trends and sleep through the night, but it hasn't been as accurate as I was hoping. So the 505 software upgrade, with its improved accuracy, is naturally appealing to me.