I've had the Mirage for just over a week now and put on just over 1300 km on it. Last night, heading to work I had to brake really hard for a moose, and I have to say that I was pleasantly surprised. A big bull moose was on the highway, and I had to brake so hard, that all my stuff fell off the seats. The car tracked straight, and slowed from about 95 km/h to about 10 km/h, and it felt really stable.
Generally, driving at the speed limit or a bit over, this car doesn't handle nearly as badly as I expected after reading the reviews and even reading this forum. So far, I'm pretty impressed with this little dinky car.