Just used Red Monkey for the first time yesterday. Took four in the AM on an empty stomach with a few cups fine coffee, then 4 more in the late afternoon.
It's not something that will get you wrecked, it's more subtle than that.
I experienced mild euphoria, felt relaxed, and was in a solid productive groove all day as I ran errands and worked on some projects.
The real trick is when you interact with people- I'm not typically a gabby person by nature, but this stuff will make you one. I spent 10 minutes in meaningful conversation with a random elderly lady at the store about life and politics, and spent easily twice as long on the phone with a few family members as I usually would.
The notes the Red crew have provided about this being great for things like interviews and dates are spot-on. You'll be relaxed, you'll be positive, but of key importance is that your mind will remain sharp.
Bonus is that I slept like a rock last night, and don't have any kind of a post-substance hangover to speak of today, beyond feeling a little fuzzy headed upon waking.