I've taken MK-677 in small and large amounts. GH Pep® from elite sarms made me look more muscular with a small improvement to joints and sleep. I was a tiny bit stronger. The price of it from Elite Sarms is more expensive than from some other sellers, yet is domestic for me.
My bodybuilding thoughts on the use of MK-677 is that it can be treated as a combo of hgh and igf-1, so use a consistant amount every day to get some hyperplasia (tiny amount). It can be stacked with anything that raises hgh and will probably be worth the money.