The Monster XXL can is awe inspiring. When you see it you almost have to take a second to realize that no one is there to cue the angelic harp music. At nearly 24oz you'll never look at those 8oz energy drinks the same way. It raises the bar in the energy drink industry. The can is all black with the Monster logo in bright, electric green. The simplicity of the can design is great. The XXL font reminds me of the superbowl.
As with the Bookoo drinks, riding in a car is awkward, if your cup holder is big enough to hold the bottom, it's so top-heavy when it's full, it wants to turn over. Or, in compact cars, often the cup holders are mounted under the radio/air condition controls, and the can is too tall to fit under.
It's like Monster, only bigger. I've always found the "green" monster a little on the thick side. When it's extra-cold, it goes down pretty smoothly, when it's not, it's like chugging maple syrup, and when they get that syrup in them, they get all antse in the pantsy. At 300 calories, this is reasonably sized snack or lite lunch, and enough fluid that you don't want to guzzle it down before a long drive, or 4 hour lecture, unless you plan on taking frequent potty breaks. Without a doubt, it's energizing, the sugar alone makes you spaz out like bobcats on booze. The value is very good, compare this to a dinky can of red bull for $2, forget about it. This is the most energy you can get for $3.
The original Monster will always be my favorite. It has everything in perfect proportion. Perfect flavor, heavy on the syrup, and just enough carbonation. The 16 oz can has always been enough for me, but now that there is the 23.5 oz can, that's all changed and only for a dollar extra. It's almost three times the size of a Red Bull. Bigger is better! If you chug down the Monster as fast as I do, that's definitely a bonus. You may want to have a quick snack before partaking in the XXL because it will give you the hand shakes. Cheers!