This is one of the most difficult acrobatic series on beam. Consisting of only saltos and with a massive connection value of 0.4, it's highly rewarded, however, its difficulty makes it a rare combination on beam. Olesya Dudnik was the first to do this back in 1989 (she was always ahead of her time), and besides somebody else from Ukraine who also did this in the mid-1990s, we had to wait nearly 30 years to see this gorgeous combination again.
This ranks up there with the Produnova vault, which is so difficult to land that nobody else other than Elena Produnova herself has been able to land it properly since 1999. For me, it takes something as remarkable as this to really deserve the word amazing.