For a recent trip to Las Vegas my wife and I bought a 5 day all-inclusive Go Card each and without hesitation I would say they are fantastic value for money. If you had a family I would say they would be invaluable but like anything else you have to do your research and make the best choice for your circumstance. Obviously to get the value you need to use the card which means covering as many activities as you can. Also be aware you can only see 1 show per day.
We paid approx. US$320 each for 5 days. These are a few of the attractions we did, The Beatles - Love - Cirque du Soleil, Vegas! The Show, V - The Ultimate Variety Show, Madame Tussauds, LINQ High Roller, The Mob Museum, Monorail, Titanic: The Artifact Exhibition, Eiffel Tower Viewing Deck, Stratosphere Tower, Big Bus tours, Avengers S.T.A.T.I.O.N. + + + Ultimately the face value of our attraction tickets added up to over US$700 each. You do the math !
The process of redemption is very easy. Go to the respective box office/ ticket windows & show your Go Card and photo ID. My tip is to go to the box office early for show tickets, particularly any of the premium ones. Astoundingly we got front row centre stage for the Beatles Love Cirque show which were incredible to match the show. The face value of this ticket was US$200 by itself.
This is definitely fantastic value and certainly not a scam.