The first time I used Pre Race about 30 min after taking it I questioned it's legality. It's really that strong? which is a good thing, because after tasting something this bad it better work! I've tried mixing it in all sorts of different concoctions but nothing seems to mask the taste. I'd be interested to see how the Pre Race Pills work.
For a racing situation I doubt that anything that isn't illegal could give you more of a boost coming off the line. I do seem to notice that my HR for rate of perceived exertion is a bit higher than normal though, but I imagine it's because all the stimulants pumping through your veins. Bottom line, when I'm racing I'm mixing up some go fast juice before the start.