I had a wonderful stay at the Hilton in March 2012. The hotel is clean, the staff is helpful and courteous, the room was huge, the location is walking distance to the convention center and very importantly Steak 'N Shake.
My suite had 2 queen size beds and in a second room a pull out love seat, desk and second TV. I traveled for business by myself, but several people could fit comfortably in the room.
I took the green line to and from the airport which worked out great. The shuttle stop is just across the street from the Hilton.
Downtown Indianapolis is not big. The location of the hotel made it easy to walk anywhere.
I wish there was free WiFi in the rooms, but there is in the lobby and at Panera down the street.
I would definitely stay here again.