I don't think it is a question of whether or not it works, but how much you pay for their products and how much money they spend to advertise their products...and how STUPID THEIR B.S. GRAPHS AND CHARTS are.
MAG10 will "work," but is by far the most expensive product of its kind. $70 for 14 days! That is such a horrible ripoff. They do suspend their 1-test in a fatty liquid to improve oral availability, but I think transdermal is far superior.
Tribulus is used post-cycle to support natty test recovery, but isn't terribly effective.
M caps are also for post-cycle, and has products in it I've never heard of. Compare this to 6-OXO, which is widely used and effective, I would chose 6-oxo.
PLUS--In all, I doubt you get more than 2 weeks of dosing for $91. In other words, $180 for a one month cycle.
Contrast this with a cycle of M1T followed by liquid nolva, which will give greater gains in less time and cost you $50 or so.
You could do three, one-month "real" M1T/Nolva cycles for the cost of one Biotest "cycle."
For these reasons, many of us stay away from Biotest, although Hot Rox seems to be popular (but also over $50). Hot Rox has andro in it, which is a departure from the traditional thermogenic.