Heard of it but never used it. It hasn't been around that long but from what I can tell so far it just seems like another crazy peptide bullshit product.
Everything I've heard, and granted I haven't heard much, but it all says you build large amounts of muscle, burn fat all you ant keep all gains, etc...this kind of thing is a red flag most of the time.
Honestly, buy HGH & IGF-1 and I think you'll be much happier.