re: Best pre-workout?

I wasn't a fan of C4, it did nothing for me.

Dr. Jekyl and Mr. Hyde stack was good.

Using Jym now and it's by far better than anything else I've tried other than the original Jack3D

Since the FDA banned everything that works, all of your pre-workouts are the same. It's a caffeine base, beta alanine to give you the itchy/tingly feeling, a proprietary blend of bullshite, and some add a little creatine.

Jym is the only one I know of now doing anything different. It's developed by a reputable Dr. It's the only pre-workout I've taken in a few years that I can't take at full dose. I did a full dose once and didn't sleep that night.
Even with the Jekyl and Hyde stack, I took more than the recommended dosage.