Received this map last Sept., right before we went to Europe. The offer at the time was if you buy 4 maps the fifth one is free, being the least expensive in the bunch this was the freebie. So basically, this map cost me nothing, which is exactly what it is worth. Some of the Vaporetto routes have change and some of the routes have been re-numbered, so its' useless, not to mention you need a magnifying glass to read it.
There is a Vaporetto website available, in English, showing the most recent routes, so you have the latest and greatest ( I believe you can also download these). Also, there are maps at all the Vaporetto stops which are very easy to understand no matter what language you speak.