I've done two 12 week runs with GW-50 so far, and can't really say anything negative about exteding time on beyond 8 weeks, if doses are kept at 20 mgs day. Only thing that worries me about being on it longer than 12 weeks is that when body gets used to it logically GW's effects will get weaker over time. So IMO it should definetely be cycled off to keep your responsiveness to it at maximum.
And YES, SarmsSearch GW-50 is as close to magick as it gets, lol!

It already has so many positive effects, and it seems that everyday people keep finding new uses, or other postive aspects for it. I really love GW-50, and plan on using it as often as I'll be able to fit it to my schedule with correct timing, so there's enough time in between cycles, and everything else ( = other compunds/substances ) is in place.