I was going to say the same thing.
I would really only recommend a preWO stim if you're just going for a PR and not doing much else after that. I'm training with CT's HP Mass right now and quit taking preWO stuff just because I do alright on the first exercise then I pretty much crash. If I have something simple like coffee before though, I'm fine.
I have some preWO stuff left over, and I plan on saving it for when I retest my 3RMs. That's all it's good for IMHO: a nice rush of energy that last enough for you to warm-up to an all-out PR set, and then you lose it, making the workout seem much longer.