I agree JJ can be hard to play but if the reads you have on your opponents are decent enough, and you have a decent understanding of how to play winning poker, JJ should be a profitable hand in the long run. Versus a random hand, JJ has ~%77 equity.
Over my relatively small data set of hands I have been dealt JJ 53 times, voluntarily put money into the pot ~%94 of the time, and am winning ~%75 of those times.
Not sure if the other replies are serious or not (I really hope not) but both are pretty wrong...
thats exactly what i said~
"Success is a science; if you have the conditions, you will get the results" -Oscar Wilde