Its worth about what it costs. It is sometimes handy but othertimes very frustrating when it cant find a certain street (extremely common even with 100% perfect spelling). In addition, the map can only find things that are spelled out fully. For example, if you are looking for Via del Boschetto, you cannot search for Boschetto or even Via Boschetto because both will yield "no search results". Its a good app as a back-up, or in addition to perhaps a paper map, but be careful not to rely on it map to get you around.
ARG-12345 about TicketLens: Tours & Activities, v8.3.1