I just posted in another thread about this. I've used Nitrobolic from Vyotech - which used to be absolutely amazing for me. I have a hard time finding it anymore though unless it's online. I tried NO Xplode and it didn't seem to work as good as the Nitrobolic but that's just me.. Still works good though. I've had Superpump 250, had great results with that, no complaints--Although I only had it once or twice so that's not very well backed up but I have still tried it. Then I tried Jack3d. Loved my first container but I swear they changed something in the recipe cause anymore it seems to have hardly any effect on me other than making me feel tingly. It doesn't give me energy, or make me feel like I want to work out like the others do.
I've been so broke lately, I haven't been able to test anything else or even try any of these anymore. I absolutely love testing new supplements! I wish I could just get free ones and write reviews about them, that would be the most awesome thing ever, lol. I would love to try the Superpump 250 again though since it's been a year since Ive had it and it definitely did give me energy and pumps. Loved it.