On our second visit to Dubai we decided to visit Burj on a slightly cloudy morning, so that we could enjoy the panorama without the usual haze.
We've got our complimentary tickets through Emirates, since we had flown with them during expo2020, so I can't judge the entry fee, but in any case I can say that it's totally worth it.
The elevator ride a bit scary, and when at the terrace and you looked down you could see how miniscule you are. You've got a wonderful view on most of Dubai, and if you go early you will beat the crowds and enjoy your time without being pushed here and there.
It's an impressive building and also entertaining,with a lot of boards and pairings showing how it was built, showing who built it, etc.
Definitely a must when in Dubai!