@rhewett Yes the internal unit conversion is pretty much the biggest advantage of astropy.units. If we were to allow a default unit (not that I wan't this) we can just do this:

```
def myfunc(x):
    x = u.Quanity(x, unit=u.deg)
```

Which if the input is a quantity will convert it to the correct unit and error if this is not possible, and if the input isn't a quantity it will convert it to the default unit.