Pre workout formulas ... help

Karabobarra

I was looking at pre workout formulas today, there are just so many of them it's hard to decipher which is best.
I want something that will give me a little energy, maximize a strength workout, but doesn't contain a lot of caffeine in case I have to use it later at night.

what pre workout product do you use?

dgoradia

A banana works well for me.