Bangalore is probably the best city in South India. One of the greenest of the all in India probably after Delhi.
People does understand english. Lots of International companies over there.
Information Technology hub of India.
When you compare to international cities like sydney etc it is a very small one.
But it would be one of the top 3 cities to live in India.
Crime rate is comparitively low than other cities.
Regarding transportation, all modes of transportation 'available' in India are there. Common ones are Trains, Autorickshaws, taxis, buses(government and private).
City traffic would be very high.
If you are looking for the best one in India obviously it would be a very good choice, but as the guy who posted before if you are looking in an international level probably below average city.
Hope that was informative.