Well, I've only had the Yaris for about 3 weeks, but so far so good. It has great interior room, handles well, and has good power for a 1.5L engine. The gas mileage is really good as after 4 fill-ups I'm averaging about 34-35 mpg. Most of my driving is highway and the Yaris has no problem going highway speeds and has plenty of acceleration to get up I-70 in the mountains outside on Denver. Given the looks, performance, comfort, and gas mileage that I'm getting for the price I paid, this car was an unbelieveable deal.
The audio system sounds great amd the car has lots on interior room.
You do get a lot of road noise at high speed, but I just turn up the stereo.