Michael Scally has a thread on proviron at meso rx.

I hold his viewpoints in high regard and wish he was still active in the AAS/TRT community.

He concludes that proviron is useless for anabolic or androgenic effects.

All the the positive anecdotal information on proviron (including Marcus's reports) say that proviron is best for hardening up the body on a cut or for show prep.

I'd rather use mast as it's proven to give a more hardened look plus gives a large strength increase.