>>15748134Yea it works for me. I haven't bought the strongest pre-workout but mine contains around 250 mg of caffeine per serving which is almost double a normal cup of coffee. But like with all products that contain caffeine, in time you'll build a resistance to it and it's best to take a break from it for a couple of weeks or so.
As for recommendations, I don't know what to tell you. Its more about trying different flavors and brands until you find the one that you like.
You can't go wrong with Optimum Nutrition for starters, I feel they have the best quality products.
Do you take creatine as well?