I've been trying Spike and it seems OK. I'm awake but somewhat pissed off. I guess it's good for pre-workouts but not at 7:30 AM at work. I use it mainly for focus or studying instead of coffee or I need a boost to workout after a 10 hour workday. What do you guys like? I checked out the preworkout formulas and nootropic guide. Frankly I don't want to run a chemistry experiment in my kitchen so I need a good premade stack that's affordable, convenient to take, not nasty tasting, and doesn't give me jitters. Thanks.