Here is my review on n-acetyl-Selank amidate.
It's been rather anxiolyctic, relaxing with a relatively mild stimulation. Wakes you up a bit while keeping you calm and able to cope with stress more easily. Nootropic-wise it's rather disappointing in my opinion but adds nicely to a stack, as an icing on a cake.
If you don't have anxiety issues I'd say selank amidate probably isn't too noticeable for you.
Oh, and if you're a (medical) kratom user, this compound will enhance your high by preventing the degradation of enkephalins which are basically endogenous opioid peptides.