Have been using one since 2009, CBU unit. FC wise depending a lot on how you drive it. I can achieve >500km in full city drive (Puchong, Sunway, PJ), light on pedal with no zoom-zoom with others. My average FC with the current fuel price is like:
- 0.14/km for full highway drive
- 0.16/km for mixed drive
- 0.18 for 100% city drive

It's a very nice car to drive on the highway, as it's stable due to the length and width. Torque is sweet when above 2000 rpm, so need to control your right foot a bit when accelerating from standstill to have a good FC

Maintenance wise, so far only go for those routine maintenance, no major parts broken down yet, touch wood . But parts should not be a problem, as it's sharing the same engine as the Forte. So far quite happy with the service from Naza Kia, waiting time is much shorter than my previous experience with UMW Toyota.

I think there are a lot of features on this car that you can't get in other makes in the similar price range, like:
- illuminated glove box with lock
- illuminated power windows switches (all included rear ones)
- tip-tronic gear box
- projector type fog lamp
- variable intermittent front wiper
- full car lock/unlock from passenger side
- front reading light with sunglasses holder
- front door courtesy light
- double din usb mp3 player with 6 speakers
- full flat folding of rear seat, can fit boxes larger than 3'x4'x5'
- good rear leg room, with 2610mm wheelbase
- driver seat height adjustable
- variable dimming of instrumetation light
- variable speed air-cond blower fan
- air-cond system with heater (good when outside is raining and you don't want inside to be too cold)
- double layer arm rest
- power outlet in the arm rest with small opening for the cable to go through the arm rest internal partition, so that you can charge something either in the glove box or outside the arm rest.
- rear arm rest with storage compartment
- and may more that I need to go over the car and have a look

BTW, planning to let go the car for new new Cerato. So if anyone is interested, please PM me to discuss further. Car is still under warranty till next year, 100% accident free, non-smoker car, low mileage (around 72k now), and 99% of the time only driven by myself, so the rear seats are still like new.

Thanks