Go early! We arrived around 9.30h and didn't have to wait, but only an hour later there was a queue to the Picasso exhibition. The exhibition shows different paintings, scetches and sculptures from various periods of Picassos life such as Cubism, Surrealism and the Blue Period. The exhibition has a nice size, being not too big and not too small. Unfortunately, only very few texts are translated into English so it is not very tourist-friendly.
Entrance is free everyday until 1 pm