There are some infos about RAD140 on this forum. Just use the search-tool they are scattered
The lack of info (on scientific basis) is because RAD140 is a pre-clinical drug. In comparison, Ostarine is four stages further and reached the last stage before launching on the market. It's only a matter of time or bad news which will the launch stop for a while or quit the researches in the worst case (referring to S-4).
But interestingly to mention (once again) is that RAD140 is tested as first SARM in connection with Testosterone Propionate. The animal study has shown that the anabolic effect of Testosterone + RAD140 were increased while the androgenic effect decreased. This is a very nice pathway work particularly for the patients.
The other SARM were not tested in this way.
But it will be like the other SARM: overrated. It won't give you "side effect free 20lbs lean mass in 2 weeks". The only thing which is interesting is the affection on the anabolic/androgenic effect in an Testosterone cycle.
But also on the other side: are you willing to take the risk to move the anabolic/androgenic ratio with an unknown substance? In fact, RAD140 have given in animal studies Testosterone an improved overall effect. But let's wait for more infos instead of dreaming about a "new compound which changes the whole bodybuilding scene"