Hdrol was my first cycle and i used it several times, i really liked it. It was probably the most user friendly thing ive ever used. I remember being scared to take more then 50mg a day. 2 years later im up to 125mg a day and i never saw a single side effect. There was someone here back in the day using 200mg a day. I think i stopped at 125 because it seemed to have capped out on what it was doing. I wasnt even sure it was better then 100 so i always said 100-125 was the sweet spot. Oddly enough, if you wanter outside the forum and listen to some of the coaching podcssts you will hear most orals around 100mg seems to be were they run them