I can take opera or leave it (although some of the music is well known outside the opera house), but when in Lucca, this museum is fascinating, We bought our tickets at the office & bookshop on the plaza (Piazza Cittadella; where the Puccini statue is), and the museum is well-marked on a street off of it. We walked up a long flight of stairs to the museum (there is a lift, but we read later that it has to be booked to use "at least 2 days before the visit" at the ticket office. We were welcomed by a very knowledgeable staff person who would occasionally stop in a room to tell us about something special (it wasn't crowded). We wandered around the rooms, following the map. Many items of the era and Puccini's life and creative works were displayed. Of particular pride was the Steinway piano and autographed scores and markings of modifications or interpretations. The 1926 costume of Turandot from the NY Metropolitan Opera amazing even to a opera neutral such as me. We saw the upper room (garret?) where he composed and could just see the "angel" statue over the rooftops from the Cathedrale San Michele--an inspiration. I've been to many homes of significant authors and composers, sometimes disappointed and sometimes inspired myself; this one was worth the time and entrance fee.
[The map/program says no pictures or video recording, but the staff person said it was okay.]