Having had both NZ CAA Medical and CASA Medical can say this may be the only area CASA may have a (slight) advantage over other systems is medicals. I can remember the complete head Fcuk it was to get a NZ Medical compared to CASA and then the ridiculous charges CAA charged. Was over $400 and that was nearly 10 years ago. I renewed my CASA few months ago and was under $200 including CASA rubber stamp charge.