I'm with Cobra, I ran S4 at 50mgs 7 days on 0 days off for 60 days, one dose per day, and I didn't get any vision side effects until about day 58.
Even then, it was just blotched vision 5 mins after I woke up and yellow tint when I walked from a very well lit area into a darker area.
The hard hitting anabolics were totally worth the sides for me since I didnt really have any! And I am going to run them together this fall I think.
I think my problem with OSTA was user error and not necessarily OSTA related. I ran it for a shorter duration at a higher dose (15 mgs per day, for 40-50 days). I think it would have worked out better, but I had a little spill accident that cost me a few days worth at least.
That said, S4 was more intense. I think if youre one of those people that like the cracked out high focus feeling before you work out (N2KTS users >
) then you will appreciate S4 more.