Sustain Alpha has a quite pungent smell, but it's not bad at all once it "settles" into your skin. It actually smells good after that, from what I've been told by the ladies at least.
Dermacrine smells much better though in comparison.
I just got a bottle of Sustain about a week ago and it smells great. I wish I had an earlier batch to compare it to, but this is the first time I've used it. I believe it's the sandlewood oil that is most dominating, although there is just a hint of the caesar salad smell (but not much) that I've heard some people compare it to.