I don't know what happened with all those who talks they have heard all sorts of troubles. But my recent experince too,  was very good.

I went to ktm from london via delhi. The only problem i saw was u have to claim ur luggage and wait outside until 3 hours from ur departure time to ktm.

The ppl were very helpful inside the airports, specially those couple of quities in uniforms.

I found a nice nepali kanch in resting/lounge area who was very helpful and kind, and alos offered me some money when i was just left with dollars ( i didn't took it, i excahnged the dollars). The guy at the bar was nice too ( may be becuase i tip him good money).

spend 5 hours watching songs @ bar and kingfishers beer.

I think ppl just make big issue when once in a while some one gets random check or something.

so I say go for it.