I do not know if it was because of the BTS concert...

I do not know if it was because of the BTS concert and because there were really a lot of people, but little information was given about where to go and even the staff did not know what was happening. That's why I got in later and missed a place at the front of the stage. The whole organization was not really structured and although it was said before that you should come (if you are between 12 and 15 years old - so just U16) in the company of an adult person who should be even in the same area. No personal details were requested, nor did people look to see if we were traveling with the said adult. Also, it might be an idea to discuss whether to ban people being allowed to film in the dome with their cell phones. Instead, for example, a camera crew could be hired to take good shots of the concert, whose videos you can watch later (whether you need to buy them or not is another aspect). It was a pity that I could barely see my favorite musician because the cell phones blocked my view - and I'm really not small. Then I just had to look mainly at the monitors. The last negative point might be that if you just like BTS (Korean musicians) perform foreign musicians who may also want to say something to the fans, the spoken translated into English. I understand that everything is translated in Dutch, but it was a pity anyway. Otherwise, the sound was really good and I enjoyed the concert. The location is relatively central and the decor is good.