Take for example the Rome Omnia Card, the card issued by the Vatican in Rome: it is valid for 72 hours and is sold for 113 euros.
The breakdown: Vatican / Vatican Museums (the single ticket with preferential entry 21 euros), Ancient Rome (Colosseum and Roman Forum 16 euros), the Galleria Borghese (22 euro), Basilica of San Giovanni in Laterano and Cloister (5 euros), the St.Paul’s Basilica Outside the Walls (3 euros), Open Bus Tour (28 euros) and use of the Roman public transport (18 euros for the 72-hour ticket).
The total of the single tickets considered makes 113 euros. In practice, despite grueling visits, the card barely bear its fruit. In short, getting up at dawn and transforming your holiday from a moment of relaxation into a hectic activity is not enough to make the OMNIA card convenient.
Much easier to save with the Artecard Napoli (3 days, 21 euros), which includes free access to the first three museums visited, the discount on the ticket from the fourth museum onwards, and unlimited access to public transport. It is enough to visit the National Archaeological Museum (18 euros), the Certosa di San Martino (6 euros) and the Royal Palace (4 euros) to be able to amortise the cost of the card. So the 13.50 euros that you would spend on public transport (day ticket of 4.50 euros multiplied by three) are saved.