I would say 0.5-1 point in the EQ
Scale, but I noticed that I could last a bit longer. However when stacked with gingko and tribulus the effect was much stronger.
Note that you'll have to take a lot more then they write on the bottle to see any effect, for example with gingko at 150mg/day I did not felt much but when I wramped it up to 250mg.. boom, I started to get erections walking down the steeet whenever there was a hot piece of ass around so I guess that you need to experiment to find your thresshold at witch your body gets the maximum benefits form it.
~Blue.