Originally Posted by TonyR
It will taste much smoother if you let it condition a week or two compared to how it tastes right after you add the extract.
Also, keep in mind that some extracts just don't work very well. A buddy of mine made a clone of Magic Hat #9 a while back, and even after a year, the apricot extract still tasted like strong cough syrup.
Sometimes it's just hit or miss.