Went there about 5 years ago. Both pilots required to do a sim-check in a sim with Kathmandu visual (though no required to be a/c type you operate) prior to being allowed in.
Handling on the ground was slow and bureaucratic, even though we had a handler flown in from India.
Visibility can get low (haze) even with a good weather forecast.
Agree with posts above, if you do your homework, no big deal.