I've used Redline, not so much as part of a cutting stack but rather for energy and alertness.
I love the drinks, personally no other so-called "energy drink" on the market works for me. The capsules I have to double-dose to get an effect, and it's still not as strong as the drink. The liquid concentrate, IMHO, is a ripoff, I even triple-dosed it a few times and it never did anything for me.
What are you looking at Redline for, cutting, energy, etc? IMHO there are much better stims out there for cutting (and less expensive) like Leviathan Reloaded. But for energy...nothing beats a Redline drink for me!