I've had a tour of BIAL. It is a beautiful airport.
Vancouver's YVR airport is very well ranked for how welcoming and beautiful it is. BIAL is much nicer and as functional.
I haven't been there, but based on photographs and videos, it is probably closer to Singapore's Changi Airport than any conventional airport.
What's even better about the BIAL deal is that passenger volumes are on a crazy trajectory over the next 20 years and Fairfax has about 400 acres of development property around BIAL that it can develop.
With more and more companies moving their business to India from China, that bodes well for BIAL and India in general.
Cheers!