Are you taking caffeine to kickstart your workouts?

Are you taking caffeine to kickstart your workouts? How much does it actually help your performance?
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This new systematic review and meta-analysis looked at some of the best evidence to answer whether caffeine improves strength (1RM) and power (vertical jump).
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The authors only included studies that used caffeine in capsule, liquid, gum or gel form. They excluded those who used caffeine in the form of coffee or alongside other compounds. .
Most studies used between 3 and 7 mg of caffeine per kg of bodyweight about an hour before the experiment. On the high end, that would amount to 560mg of caffeine for a 80 kg person.
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Overall, caffeine showed small to medium benefits on performance, which in real life could signify meaningful changes in results from training, especially at a more advanced level of training.
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Interestingly, when analyzing subgroups, the authors also found that caffeine increased upper body strength but not lower body strength.
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Do you use caffeine yourself? If so, in what form? Do you think it gives you an edge in your performance in the gym?