Superdrol was the only thing I've ever done. Until now, a year later and I'm doing a cycle of H-drol.
I made great gains on S-drol. I'm very lean and always been a hard gainer. I think I gained about 12 lbs on it, doing standard min dose 3 week cycle. 10-20-20 and all the proper PCT.
Holy shit did I lose hair though. Freaked me the fuck out. I'm only 32 now and have never lost hair before. People noticed it and commented it. My sister was always giving me grief about how I was "getting thin" etc. I started taking 1mg finisteride per day and using minoxidil. 1 year later I've got most of my hair back but not all of it.
I'd love to do Superdrol again, and in fact have 2 or 3 extra bottles stashed somewhere in the back of my closet, but because of the hair loss (oh got a little bit of back acne too) I'm never going to do it again. Sucks cause the gains were awesome, fast, and quality.
Edit:
The H drol gains have been very good. I'm in week 3 right now (of 4) and up 8 lbs. No sides at all, other than a bit of lethargy a couple days, but that could be allergies too. The gains were better with S-drol, as on H I'm really trying to force food down to gain and keep up with eating enough. If I have can't pack the food in hard on a day, I'll lose a lb, and If I can I'll gain half to 1 lb. My body just has a hard time holding on to weight. I guess the good side to that is that I don't gain fat easy either. Right now I'm 10 lbs heavier than when I finished the S drol cycle last year. I'm still lean and it's muscle mass gain, but I was definitely more defined and shredded looking on the S drol. Not to say I have not been very happy with the H. Just that S is stronger. But so are the sides.