im curently useing synthol. im not really trying to gain masive size, but rather a better peak on my biceps. it has helped reshape the muscle without making it look stupid. it gives it a better buldge. in my oppinion you would have to use synthol for a damn long time and use massive ammounts to become like valentino.
heres the bad part, bruising, you will end up nicking a vein eventualy and your bicep will bruise . ive done prety well of injection between the veins but sometimes you miss.
then theres the pain, Im on a 30 day run, starting with 10days of 1ml per head (2 heads per arm), then to 10 days of 2ml then to 10 days of 3ml. by the time you get halfway thru your run with 2 ml you really start to feel the streching. it will hurt a little to straiten out your arm.
and the injections, you need to inject into each head on both arms every day. that 4 injections a day!