I'm Currently Looking At Ingredients In Pre-workout Supplements. I'm Would

I'm currently looking at ingredients in pre-workout supplements. I'm would like to know your opinion on these kind of supplements. Are they really ok when used as suggested? The supplements added to the pre-workouts seem to be very effective with mostly minor side effects when coupled with other drugs that serve a similar purpose, but I still would be very interested in what you have to say in this topic.
Thank you!