I have had great success with melanotan 2 - started a couple weeks ago (couldnt tell you exactly how many times I've injected now).
I didn't buy premixed I bought 50mg which comes in 5 10mg vials and mixed it myself.
Results have been great I go solarium a couple times a week also. I am auburn haired and dark eyes and because of my background I can tan regardless of having the redhead gene.
The only side effects i have encountered are nausea but that isn't as bad anymore. This has decreased my appetite a whole lot and has led to me eating less (not exercising more) and so far I've lost like 3kgs..
The only thing I would say is that my abdomen (stomach, back, and ass) is tanning much better than my legs and arms (and even chest). A friend told me it could be the lymph glands transporting the stuff mainly locally. The chest one I don't understand though - could be because there isn't much fat there (besides boobs) but I cover them up when tanning.
Hope I've helped!