This stuff is awesome. try it if you havent.
if you have share your thoughts.
I have used both RPM and Drive, stacked together and apart.
Together it it is an awesome stack for performance (i.e. endurance, strength, speed, speed endurance, etc.) and leaning you out.
Individual thoughts on both:
RPM
Unlike other stimulants RPM provides me with a smooth, focussed energy (as opposed to jittery, restless energy). In the gym I am calm and almost RELAXED. Training sessions seem to move in slow-motion, and sometimes I cannot believe that an hour has ALREADY passed (when it seems like I've only been in there for a few minutes). Being an aggressive person by nature, on RPM I can amplify that aggression and channel it into my training, thus providing me with better quality sessions. RPM also adds just that much more to my pump and vascularity: The pumps are great, and are painful at times, with vascularity ropes and knots of blue snaking up arms and legs.
Drive
Unlike the 7-10 days that it takes for males to notice the effects of Drive, it takes me 3 weeks for Drive to kick in. However, once it does I notice greater endurance (and my endurance is pretty high as it is), especially for HIIT sessions. I also notice increased SPEED when doing such sessions, as well as with my running; over 8 weeks I went from doing 4.5 min/km to 3.8 min/km over a 5.5km distance. Mood and libido both increase as well, along with muscular strength.