Possible Duplicate:
How can I tell how long (more or less) it will take me to complete a game?
How long does it take for an average player to finish all acts in Normal Mode?
Only a reference from Blizzard or another strong reference could answer this, please note that I'm not asking to post an opinion.
I'm considering buying it to my wife but I know she's not a big fan of Diablo's endless "replayability", so I'm trying to know if it is worthy.