Metformin, success??

Went to the doctors to see If I had pcos, my blood test came back that my testosterone was slightly elevated but my ultrasound showed multiple cyst so they went ahead and diagnosed me with p.c.o.s I think I have slight pcos I'm very skinny 5"6 weighing 123. Barley any acne. My obgyn put me on metformin 500mg for a week then I'll go up to 1000. Any success stories with that dosage?