I think USP is alright... But, the big thing about Jack3d that most ppl feel/like is the d1,3, which can be bought in bulk for dirt cheap, and dosed/added to any pre-workout you like...
For the money, my favorite is Controlled Labs Green Magnitude/White Flood or MP Assault... Plus, it's very possible that Jack3d's big ingredient (the d1,3) may be banned in the not so long future... Already banned in Australia and a few other countries because ppl are using it as a party drug, lol.
- 2003 SVTf ZX3 w/tons of bolt-ons (turbo eventually).
- 2000 Xploder XLT 5.0 AWD w/torquemonster headers, custom dual 2.5" exhaust, MAC CAI, and much more.
- 2010 E350 XLT Super Duty (the wife's bus).