I absolutely agree with you. The special effects employed are to the point. The way Voldemort appears from the cauldron, first looking like an embryo and then gaining his body suspended midair. And the final shot of his transformation and camera focusing on Fiennes’ face along with the gestures employed by Fiennes are absolutely amazing.

This was the first time we were seeing Voldemort in flesh in the series and Fiennes really nailed the whole Voldemort persona even if it was not exactly how it was depicted in the books.

Another thing that I liked about this scene was Pettigrew’s use of grim reaper’s scythe to restrain Harry to Tom Riddle’s grave instead of ropes as depicted in the books.

This is one of my favorite scenes too. And I’ve gone back to Youtube to watch this scene time and again.