I have been using Honda DIO for over 2 years now. Of late I have started disliking the seating desing of the vehicle. Riding it for longer hours/distance would put you into lot of discomfit. The rider as well as the pillion rider will feel the pain in their back. High time that Honda needs to work on their body design aspect.
I have no concerns about the engine performance, for over two years now the engines performance is really smooth and the pick up is as it was when I bought it.
Though the spec says that DIO has got a aero dynamic shape which would help it cut through the air, the riding comfort is really bad.
Also, the foot pegs are placed at a very bad position, which would make the pillion rider sit in a very uncomfortable position.
Hope
these aspects will be improved in the forthcoming models of Honda.