rick, using the S4 for 2.5 wks now. was at 50mg now at 70mg 4-5x a wk, no vision sides what so ever. Have leaned out a bit, but not too much. It was my birthday aug 27th so there was some drinking, pizza, bacon cheeseburgers, etc. diet suffered a bit but will get back on track asap.
also have been on beta alanine, creatine nitrate, need2slin. insane pumps. idk if s4 is adding to that or not, hard to tell