I have been using MK-677 for almost 3 months already and wanted to do a short summary.
I started in March 2017 and been using 20mg Mon-Fri.
The things I have noticed: It is an amazing drug for sleep and recovery! Sleep is simply incredible, I always wake up feeling completely rested and recovered from previous day's workout, so I'm able to train 5 days a week. Not feeling any muscle soreness at all.
I have also noticed some decent strength gains and minor fat loss while eating just over maintenance. Haven't really noticed much of muscle gains, maybe a few lbs.
It did also increase my appetite but I was able to control it.
I will definitely buy it again in the near future.
I hope that this information would be helpful for someone looking to start an MK-677 cycle.