I am 3 days into my 1st Melanotan cycle, and I'd say it is a LOT like Cialis. I don't feel hornier, but hard-ons come REAL easy, often too frequent and annoying. I might say that it is slightly different than Cialis, in that it makes your unit more sensitive to touch. Accidentally graze it when it's half-hard, and there's no going back. I had morning wood almost every time I woke up the other night.