Nolva can work fine, in a lot of ways it just depends on how sensitive the guy is. However, while Nolva will work to prevent it in a lot of cases if symptoms get really bad normally it won't be worth a lot for treating Gyno. Anyway, personally to me it just makes sense to go with the sure thing in Letro or Adex, plus both will help stave off a lot of other nasty effects far more efficiently than Nolva IMO.
Don't get me wrong, I don't think Nolva is useless at all, I just prefer it as a PCT med which it shines as.