I have to say as an end user of the services of City Flight AAC in Belfast, there were advantages of a single over multi-engined aircraft.
Each aircraft has a different blade/engine noise signature and the Gaz was less intrusive. On one occasion when we had Puma as top cover it was so noisy that it made ground based communication very difficult, which actually interfered with the operation we were trying to conduct.
Always considered the runt of the rotary wing litter, over the years the Gaz did pretty much what was asked of it.
EG