For me sarms worked, I ran a combo of Mk677, LG4033, and GW cardarine - and gained 20 pounds over the course of about six weeks. Massive appetite, and slight boost in strength. I know it would have been mostly water with that fast a weight gain, but the weight stuck on me after I finished and I think I've slowly recomped most of it to muscle over time. I'm about the same bf % now as before the sarms cycle, but a consistent 20# heavier.
On the downside they shut me down hard. I was not educated then about signs and side effects, but after about six weeks I started to feel like shit, no libido, no energy. Then a week later I felt like my joints all went major arthritic at the same time, everything hurt. I think my test crashed around week 6, and then estrogen crashed a week later. I stopped then and got better over a couple of weeks. That part was not pleasant.
So, I'd caution that they will shut you down - potentially hard, so it would be good to have exogenous test and knowledge of PCT if you plan to use.
I should also add I was expecting a boost in endurance from the cardarine, but didn't happen. Could have been the combo of all three but my cardio went to crap.