I visited this WHS over 3 days in June 2014. I bought the 3 day Museum Pass for 24euros which gives you access to several museums in Berlin apart from the 5 museums on Museum Island. The view of the Museuminsel from the boat trips on the Spree River is worth having. There are massive works going on to implement the masterplan of connecting all 5 museums by 2026 so there will be cranes around Museuminsel for quite some time. I was very happy to be able to visit the Pergamon Museum before it closes its doors this month till 2019. The Ishtar Gate, the Aleppo Room, the Pergamon Altar are the highlights of this museum. However, after having spent a whole day in this musuem, I have to underline that these are just the cherry on the cake. There are treasures upon treasures to see and it definitely deserves to be considered one of the top museums in the world. The Neues Museum's highlight is the beautiful bust of Nefertite. Once again this is just the highlight of a rich collection of Ancient Egypt artefacts and remains. The Bodemuseum and Altes Museum are the places to go if you love sculptures and statues. My highlight there however was the exterior of the Bode Museum which is perhaps the best one out of the 5 museums. Finally I visited the Nationalgalerie which houses a vast collection of the 19th, 20th and 21st centuries. Museuminsel is definitely one of Berlin's highlights and I'm really curious to see how it will develop in the near future.