good for beginners I guess, but just looking through they didn't actually optimize based on studies for each muscle, they put large compound movements which hit many muscles at the top of each list. so tread with care on this and definitely don't base your workout on targeting single muscles unless you're an advanced bodybuilder targeting a lagging muscle, in which case you don't need this because you already know what works best for your body and what works in general... so yeah, cool but not that good or useful tbh