Just a few months late on this but... the Karimun isn't that great on the toll road when driving at speed. They're a bit too boxy for their own good. A similar car would be the Daihatsu Ayla which I feel handles the toll roads better and has a bit more comfortable interior. The Ayla is slightly wider than the Karimun, but it's still not wide by any means...just more room.
I'm 6'4" (1.92m)...the karimun is ok for me...but again, ayla is better.