I have only tried nicotine from MFS and it really muted the flavor on some of my store bought eliquid I wanted to increase the nicotine level of. I mean I added one half ml to a 30ml bottle and devastated the flavor. It also doesn't have the same throat burn (less) as other nic. Lastly it doesn't add a dark color like the difference between 0mg and 3mg nicotine in store bought.
