I really catch the cardamom on top. Compared to other fragrances that I have tried with cardamom, it is a nice, well-mannered spice that doesn't overwhelm the other notes. There's also a slightly sweet fruity mix on top, but I don't pick out any specific fruit, including the bananas which are frequently mentioned by others. The vanilla mixes with the fruit & spices in a delightful way that is quite pleasant. @Zhara references this phase as a vanilla ice cream sundae, and I think the reference is apt, although I don't think of Siras as a gourmand.
That's the first 20 minutes, which is pretty darn special to my nose. After that, the drydown is nice but a fairly typical sandalwood, amber, & musk thing that wears close to the skin.
Overall, Siras is very good, but not great.