I can speak for both epic and follidrone, they both definitely work, I think folli is a little bit better. They both take a couple of weeks before you notice anything at all. It's very gradually too not like andros. For me after 3-4 weeks one day i just noticed all muscles were harder and fuller. And just looked a little more buff all around after week 6 they're definitely in full effect. Check out the three reviews on both of them and I bet you'll see similar responses.
As for the m-test and alphamax I just know they both have lots of good responses on here.
Test1fy and or1gin have both also been getting good comments.