I received a nice surprise in the mail today. I didn't ask for it (at least I don't remember asking), but someone from AN sent me a "care package" with samples of Drive, RPM, and Black Cats. Now, I'm usually not fond of "samples" because how can you accurately gauge their effectiveness with just 1 or 2 doses? Anyway, out of curiosity, I took 2 of the Black Cats caps before going to my second workout (I'm currently doing two-a-days). 20 minutes passed and I was like, "This s h i t doesn't work!" Five minutes later, the biggest rush of energy I have ever had from a supplement hit me, HARD. I mean this must be what "greenies" felt like in the '70s and '80s! And the good thing was, it wasn't the rush I've gotten from other supps where I wanted to kill someone. It was just a I-can't-wait-to-get-to-the-gym kind of mentality. And it was sustained throughout my entire workout! I'll probably have to buy a bottle to see if it carries on or wears off after a few days (like other energy supps in the past), but the first impression is DEFINITELY good. Thank you Rosie, or whoever sent it to me. Thumbs up so far.