My company trained the Druk Air pilots for a while. Our sim instructors were very impressed by their guys - they were very competant and particualrly unphased by their home base. We fly to Kathmandhu and think it's a bit special, but for the Druk Air guys - it's an easy day out.
Paro gets really interesting in an OEI situation. For that reason, Druk Air operate A319s with A321 rated V2500s. A real rocket ship!