Yup, I've been testing my experience on and off of it, and so far the results have been clear that it produces more negative effects than positive

• Digestion slightly worse
• Sleep downgraded
• I've even found that I DREAM less on days where I drink coffee, which was quite an interesting discovery! That's a pretty damning point, seems like it's straight-up turning off certain parts of the brain that are more active during recovery periods