I weigh 175lbs and have been using 1.5 mg per week to maintain for about 7 months now with no side effects except slight fatigue on occasion. Tan has faded slightly.
The fact that there's so little concrete knowledge on long term effects has been preying on my mind lately however, and I'm considering at least lowering it a bit.
What have you been using for maintenance and how effective has it been?
 
 
Also, does anyone know the half life of melanotan II in the body?