I'm going to disagree, with the negative consensus.
Having learned the proper rituals, from a warlock, I've worked with "Djinn" for the past five years ...
( I'll wait for the boos and hisses to stop ... )
Though the "greenest" of practitioners could summon and work with a "Sila" ( the weakest kind of Djinn ) ... I won't lie to you, it's difficult and debilitating.
Whether it's worth going through such suffering, in order to grant your "desire", solely depends on the practitioner.
For me, it was. Through my torture, I was able to help those, which society cast aside.