Revlon's Unforgettable is a surprisingly good scent. I stumbled upon a half-used bottle from the 90s in a thrift store that was surely kept in a poor condition, so it may be very different from the new stuff, but I was surprised none the less. My girlfriend expressed that it was like a Shalimar that worked on her(it turns to pure coumarin on her). I felt it was much drier, like a more floral Habit Rouge without the lemon. Here's the official scent pyramid:
Top: Freesia, Orange Blossom,Llily-of-the-Valley
Middle: Iris, Iris root, Jasmine
Base: Amber, Musk, Sandalwood.
In practice, the opening is candy powdery, like the tingle you'd get if you accidentally inhaled smarties. The Iris scent is sweet yet dry. Bone-chalk dry. It is actually a very pleasant opening. The drydown is very pleasant to me, but may be unwearable to others. The base is classic oriental with "sandalwood" instead of vanilla. This is the same artificial sandalwood scent present in the famous Nag Champa incense, which the base actually resembles to a degree.
All in all, it's a little ambiguous and common smelling, but very nice for the price and is a decent feminine sandalwood fragrance, especially if you like Nag Champa and wish to smell like it.