Well anything would have been an improvement over the HAL airport which probably should have been condemned a few years back. But other than the fact that it is 50km outside of the city center, I've got no complaints. At 3am, it only took me 1 hour to get to the airport, but they say during rush hour it can take upwards of 2 hours, so domestic flights will definitely be a real bitch.
I flew out of the new Bengaluru International Airport on the second day of operation. It's about 100 times larger than the old airport and really a beautiful mix of glass and marble. It seems to be a modern airport in just about every facet. Didn't even have to walk out onto the tarmac this time. Real gates and everything.
The only thing I can't comment on yet is the luggage process. For those that flew into HAL in the past, you're all familiar with the 1-hour+ waits to get your luggage. But so far so good.