I'll watch anything, no matter how awful it is (mainly for HDTGM).
For 3.5 hours, it did not feel that long. The de-aging was so perfectly done that I didn't even notice it. All the acting was superb, especially De Niro. Pacino was his regular older Pacino self, so nothing exciting on his part. I really did like the reflective nature of the film and I think it made it stand out from Goodfellas and Casino.