If the cvt is ok now, and is properly serviced, it should be fine. Just like problems in other cars from other manufacturers( mustang 6speed manual, celica engine oil usage, jaguar nikasil engine wear just off of the top of my head) the problems seem to be FAR more numerous than they actually are due to the number of complaints posted on the internet. Many multiples of owners never have an issue, so you never hear their stories of reliability and long service. If 5% of owners have a problem, then 95% don't. I like your odds if it hasn't had any issues so far.
The Kizashi should soon show up in Australia. We look forward to seeing members from your region.