5 Stars for wallet value, 1 stars for health, 3 stars enjoyment.
While this has moved from $30 to $49 (or $45 with Total Rewards membership), it's still a great deal (for 24 hour unlimited access to all the Harrah's buffets, except the Rio's seafood buffet which is +$15 per visit).
These buffets range from horrible (Imperial Palace) to pretty good (Spice Market, Paris, Carnival).
The problem is even with the buffet pass, you don't get a line pass, so visiting more than 2-3 times per day (for light snacks throughout the day) would be a huge waste of time. However, maybe it would work if you had casino status for line passes, or dined at off hours.