city pass from citypasses.eu for Venice,Florence and Rome

It's my impression (I could be mistaken) that this is a third-party seller offering the same passes you can buy from more local sources. I do not know whether citypasses.eu is selling at a mark-up or whether its information on covered attractions is kept up to date. That can change, and I'd have more confidence in the accuracy of information on the website of a local tourist authority.

Whether any pass will pay off financially depends on the sightseeing plans of the individual tourist. Passes are less likely to be useful for those who enjoy casually exploring the atmosphere in picturesque neighborhoods and moving slowly through the museums they visit. Passes sometimes save money for those who want to cram in a large number of sights by spending just a little time at each one. Your allocation of five days to Venice (I approve) suggests that you expect to be an in-depth visitor.

There`s usually not a quick-and-easy answer here; you need to have a pretty good idea of what you want to see and how much it would cost without a pass. That means spending some time on the websites of the attractions you're interested in.

One thing to if you expect to make quite a few trips to Venice's islands (Murano, Burano, Torcello, Giudecca, Lido, etc.) is to consider a vaporetto pass. They are available for 1, 2, 3 and 7 days. Individual rides cost 7.50 euros this month but will increase to 9.50 euros in September.

Also in Venice there's the low- cost Chorus Pass that covers entry to a large number of less-famous churches. It would be useful if you like to drop in when you pass a church. Venice has many beautiful ones.

I heard that the Florence city pass is not being offer this year thus I thought I might need to get on the web.

True- the Firenze Card is not being offered now.

You will have to get on the internet and research each site you want to visit and almost all major sights now require a pre-booked timed entry even if you use some kind of multi day pass.Not sure how that pass will work with that.

You have to do the math to see if that pass will work for you. Does it include places you want to visit? Are you paying for transportation you don't need? etc.

If you need help finding the official websites for museums etc just ask- list them and we'll point you to where to get your tickets.

That you have to make advance timed-entry reservations at some of the attractions, like the Uffizi and Colosseum, even if using most tourist passes is exactly why I wouldn't purchase one. Might as well just go the official websites of the attractions themselves and buy your tickets/make your reservations there.

One exception is the 5-day Passepartout for the Uffizi, Pitti, Boboli Gardens and a couple other museums, and the combo passes for the Duomo complex in Florence. For the Passepartout, you must still make timed-entry reservations for the Uffizi, and must do the same for climbing the dome at the duomo if buying the Brunelleschi Pass which includes it. There are two other passes available if not interested in doing that.

For the 5-day Passepartout:
https://www.b-ticket.com/b-ticket/uffizi/default_eng.aspx.html

Duomo complex:
https://duomo.firenze.it/en/discover/dome

A couple last mentions.... Don't be taken in by advertising for passes which make it sound like you'll be waiting in long lines without one of them. No one skips a security check queue at ANY museum which has one of those, and just a timed-entry ticket bought from official websites will allow you to bypass any potentially long ticket lines. Some of tourist pass websites also don't make it plain that no, you won't be waltzing into every museum any old time you want to: advance reservations are very much mandatory at some of them. Read ALL of the information, read it AGAIN, and run a cost comparison between the price of the pass versus individual tickets.

Oh, and hop on/hop off buses in Rome are not worth the price so if the cost of a pass is jacked up because it includes a ride on one, I wouldn't buy it. For sure give the Rome Omnia pass a skip; that one is notoriously over priced, and I have never seen it recommended by anyone on the RS Italy forums.