i got terrible staining on my teeth from Mino. I got brown spots all over them and when i used to laugh you would think i've been eating chocolate all day
besides that, i got skin staining just below the eye, not big but visible, a brown spot that appeared while treating.
My dentist was able to remove the teeth staining using the ultrasonic scaler used to remove plaque... but it took hours ... anyway, all spots are gone now ...
nevertheless, i think mino treatment was really essential for my progress, since it has such good BBB penetration. so i recommend it over doxy. mino also gave me no GI issues.
doxy was harder on GI than mino, i remember.