The zebra, histogram, osd, edge overlay, scripts seem to work fine so far. the fast ev switching seems to work okay.
However, I can't get most of the overrides such as shutter speed, nd filter, iso to work. It's been a couple years since I used chdk so it could be user error but I don't think so. The TV value displays the normal value upon half press of the shutter instead of the override. I don't know if that's normal behavior. Raw enabled also didn't output any files.
Will keep testing tomorrow.