In this case it's true: Less is More
Montale ATTAR is such a compellingly beautiful perfume to my nose, and yet it features a small number of focal notes: sandalwood, oud, and rose. How can it be so gorgeous? Because the sandalwood, the oud, and the rose used are top notch. This is an excellent example of the quality ingredients strain of haute niche perfumery. Instead of attaching a bunch of bells and whistles and curlicues, Pierre--or reasonable facsimile--simply presents these notes in all of their glory.
I really love this Montale creation, the rose dominates the perfume but is deepened by the sandalwood and the measured dose of oud. (I agree with Aromi, see below, that sometimes oud-rich perfumes are a bit much...) There is a dark, mysterious feeling to this creation, with an almost animalic quality close to ambergris in the background, it seems to me. There is also a graininess to the texture which I find quite appealing. It is as though the rose petals were shredded and blended to form an oud-sandalwood-amalgam. So, yes, this creation seems fairly linear to my nose. But that's fine with me, because it smells so good that I don't want it to change.
I love a few of the Montale rose perfumes, but this one is at the top of my wishlist!