I was out in Bombay as it was in 1984 and stayed for 3 years flying mainly to the Bombay High field, but also had some very interesting VIP trips all over the north east of the country.
It was one of the best places I have worked, but it wasn't the flying that made it great, it was India, the people, the food, and much more. Friends had their kids with them, some went to the local school - with better standards than back in the UK!
If you have the chance take it, as for hygiene, take care but don't be over fussy, you have to have a few bugs in order to get any sort of immunity.
Good luck