I haven't gotten queasy taking them without carbs.
I've only gotten small flashes of heat only felt in my face, no real hot or sweaty feelings. Even moving an entire storage garage from a downstairs to upstairs unit over a 7 hour period in a SWEATER.
Up to 4 pills a day, fall fast asleep. Definite increased attention span, I usually can't read for very long without my mind wandering off. But I'm up to page 540 in Harry Potter in less than a day without any real self-imposed distractions.
Cardio was a breeze, my heart rate was much steadier than normal over a 60 minute period and pace was about 7-10 RPM faster than average without even trying or really noticing.