Thing is bro, its not necessarily 50/50 now. Rumor is going around that Zambon has reduced the microparticle size by some new method, which will reduce the amount of the sediment. Whether or not you can trust this - remains to be seen.
What i can say - Ive used those lotes of winstrol before, they seemed to work, just to be sure Ive done 2 amps per day. BUT, they are too expensive IMO and I cant really trust them to be an original. So, stick with UG labs IMO or brew stan yourself.