I rented a 17 Corolla a few months back and drove it 800 miles in 2 days. The CVT in mine was great, no "rubber band" feeling and the acceleration was there when I needed it. I actually didn't know it was a CVT until I read up on the car after my trip. It was WAY better than the Nissan Altima I rented the year before. I however didn't drive much in city traffic so maybe that's the difference.
I think its a great little commuter car. After 15 hours in one though, I can tell you the seats are not meant for long road trips! I did average ~41 MPG though which was good.