I was there on a Saturday and on the walk-in queue...

I was there on a Saturday and on the walk-in queue because all the online tickets of the day were sold out. However, the queue wasn't long and there wasn't a long wait. I followed the audio guide and it took around 2 to 2.5hr to finish first to third floors if you listen to everything. I gave a 4 star because there were signs already that people should not take any photos but it seemed that many were either ignorant or ignoring the signs. Luckily they had guards around the most famous pieces. I do think they should reinforce the importance of no photo taking. Recommended museum.