I've talked to people using it for TRT purposes. I think it was just approved by the FDA this year for that purpose. IIRC, dosage was something like 1g every 10-12 weeks for TRT. I'm not sure i'd want to use it for anything other than trt, as the halflife is just way too long, it would take too long to get cycle started, and too long from last inject to PCT.
that said, for TRT i'd definitely use it, just injected weekly or biweekly to help keep it at stable levels