Well I am totally cafeine free except my cup I have first thing in the morning. I cut out my 4:30 pm coffee completely and I no longer have a 2nd morning cup on the weekends.
My sleep is better. There is no question about that. I fall asleep easily and stay asleep. I wake up feeling like I got a better sleep as well.
I have been working out after dinner and I thought for sure my workouts would be awful without cafeine before hand, but they haven't. My workouts are not any better, but they are not any worse either.
Now that my pm cafeine intake is gone, I'm sure if I tried pre work out I would have an amazing workout though.
Not sure if I will cut out my morning coffee. I think its aroudn 6-8oz. I might cut it down to 4-5 and see what that does.
I was drinking 3/4 decafe and 1/4 reg coffee at 4:30 for a week, but I switch to 100% decafe for awhile and realized I didn't crave the coffee heat and taste like I thought I would. So I dont even have decaf at 4:30 half the time.
There was a few days I felt very tired after dinner, but it didn't last. I was thankful I didn't get any headaches by cutting out that 6-8oz cup around dinner time.
If you are a heavy coffee drinker, it might be worth a try. I really enjoy putting my head on the pillow and passing right out hard now.