I travelled on friday night, I'm currently in battakundi. The car is performing beautifully till now, we are 4 guys and even with pretty bad roads the ride has been very smooth(one guy has severe motion sickness even he was fine in back seat cuz its pretty smooth)
The two best things are the drive modes and triptonic!! It makes driving in these areas so much fun... only used triptonic at the last stretch of babusar top and overtaking, otherwise normal and sports mode work fine
No issues negotiating the roads or heights, if you planning to travel to these areas or bad roads yaris is great option in sedan after corolla grande offcourse