I don't own one but from the fleet of 30 something Mirage's we've had 3 that needed replacement. One at 304k kms, one at 223k kms and one that still worked fine but make a weird noise was replaced under warranty around 89k kms. We had another car that was having some issues, I don't know many details but after a fluid change from the dealer it seems to be ok again?
The highest mileage cvt we have with the original cvt has 261800kms in a 2015.The next highest 15's have 202k,199k,197k. For the 17's we've got 3 with almost 170k kms and they weren't easy one's I'm sure.
Off topic, the obd gps' we used weren't cheap but the seller probably bought a sea can of em and is making a killing. They worked great in all of the 70 or so vehicles I've put them in with zero problems except the finiky Mirage.
View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 35.1 mpg (US) ... 14.9 km/L ... 6.7 L/100 km ... 42.1 mpg (Imp)