The line can be ridiculous and the headache from all that sugar is not fun BUT when in Vegas, it's a must! Many sizes to chose from, a good selection of drinks, and extra shots are only $1. Jello shots topped with whipped cream are only a $1 too and they are a pretty nice size. Make sure to save your yard or cup because the refill is about $4 cheaper. You want the most bang for your buck? Go with the 190 Octane...beware, you might be crawling on the strip later.
There are various location on the strip, I've been to the Miracle Mile and Imperial Palace. The Miracle Mile one is big and the line moves fast. Happy drinking!