Is that question for any particular make?
If it was a Mitsubishi auto, I wouldn't consider it unless it had a tip top service record showing it has been flushed with Mitsubishi transmission fluid every 50,000kms.
But generally speaking, if its slow to select a gear, or harsh at shifting, or sometimes pops out of overdrive or top gear then it has some issues. Some of the time its due to sticky valves in the bodies which can usually be fixed with a good flush.