Personally I have taken the KTM thrice, one of them got delayed
for 4 hours! 
Bullet Train might be a good idea though, but considered the
service of the current situation. So what if there is a Bullet
Train, we might still end up having delay. And I personally hope
that the train will be built by Alstom, it is better and the
passenger can stand properly even though it is travelling on high
speed. 