> I am really not keen to have my mmol/L BG values converted and stored as mg/dL. It feels wrong, I would be OK with having a units, value and then a convertedValue but not having it stored as the converted value.

If I were to change our standard unit to `mmol/L` would that make you happy Jamie?  I don't really care about what unit we choose, but I do feel somewhat strongly that we need to pick one and convert everything else to it.