[CQ-Contest] energy drinks

[N7DF]

Are these a boon to contesting or not?
They seem to be much more effective than coffee or caffine pills but, at least for me, the crash after they start to wear off is really a problem.
Also, there are beginning to be dire health warnings in some quarters about their usage.
Maybe we could have an evaluation by contesters that have used various energy drinks as to their relative effectiveness and after effects.