I also have high tolerance to Stimson, personally I love the tingle in the face I usually addto all my pre workouts. I like in no order..
1. C4 with 1.5 grams of
2. Mr Hyde stacked with mr jackell
3. Jack3d stacked with with 1.5 grams of
4. Black coffee with 3 grams of
is a great pre workout that can be stacked with almost anything, awesome pumps from this product