It's pretty good. 100mgs of Ritalin and 10-20mgs Hydrocodone works quite well for me. It can make you nauseaus though. One time I railed 80mgs of Ritalin with about 3 percs in me and vomited almost immediately after insufflation
depends on your tolerance and experience with aforementioned substances. try 20mgs of Ritalin and maybe 15mgs of Vicodin.... if you haven't done either of these drugs before try them individually before combining them.
balance is the key to an enjoyable upper/downer combo, takes some trial and error to find what you like.