Actually I’ve been on Decaff for the last two months, at least during the week, and I can’t really tell the difference. For me I think it’s the smell of coffee that really perks (sorry) me up in the morning. That and the jolt of caffeine from the dark chocolate (chili infused) I put in my mocha. Other people swear on their caffeinated java to get them going and keep them going throughout the day. My doctor says caffeine is the root of all evil, right after alcohol. Other people in the medical profession say caffeine is good for you in small doses (there’s a study that says women who drink coffee are less likely to commit suicide), as is red wine. If anyone figures this out, let me know!