Golden is a bit of an awkward card that is strongest against high-strength sentries - something that isn't very common in Netrunner at the moment.
Golden is better than Mongoose for sentries of strength 4-7 if the sentries have less than 3 subs on them. For reference, the common ones there are Cortex Lock, Data Raven, NEXT Gold and Assassin. Golden falters against Ichi 1.0, Vikram 1.0, Archer and Sherlock 2.0 when set against Mongoose.
Against sentries with strength above 7, Golden outperforms [Mongoose...but there's only 2 of those.
Against GS Shrike M2, Golden only wins against Str 5 sentries with <3 subs, and Str 8+ sentries; again, 2 of those exist.
So in conclusion, in most cases, Mongoose or Shrike are better picks. I'd look to those breakers first, and only use Golden if I was worried about Mongoose's limited use clause.