I use a Nissan Tiida with the CVT gearbox. no big deal to maintain. just change the CVT gear oil on time. its changed every 60,000 kms. cost a bit more than the ATF, you can only get it from the Nissan agents. my car done 55,000 kms, works perfect. gear shift is smooth and better fuel economy because of the CVT. I get an average of 9-12 (depending on the traffic conditions in Colombo) city, and 15 on the Galle road stretch and 19.3 kmpl in the highway even hitting 160 kmph for a few mins.