I am riding this bike since last four months. Only one service is happened. Before the first servicing the gears make problem but this was rectified after first service. The mileage before servicing was 35-40 KMPL, which now became 50+ KMPL in city with congestion. If you really want to know about the bike then you should try three bikes of this 150 CC segment. You can easily make your decision.
The smooth engine of CBZ Xtreme will makes you feel better in comparison with other bike. Also you can notice the leg rest in case of Xtreme is better. If you closely watch the engine of Unicron and Xtreme, they look mirror image of each other.