Makes me laugh.
I watched a video wherein I believe it was Mark Riptoe (spelling?) showed how overhead pressing actually makes the shoulder stronger and because of the shoulder design does not cause impingement. Most dangerous to shoulder joints is over reliance on benching. The old time strong men did mostly overhead work and didn't suffer from the rotator cuff injuries that many have today.
I love when they say you can't get big and strong using them because they only go up traditionally to 105 pounds.......ok that's true but I think anyone would get much stronger from doing multiple sets of say five reps with double beasts. I think a person would be pretty jacked up muscle mass wise if he trained on the regular with beast ladders in front squats and presses!
They compare them to Dumbbells wherein you can make dumbbells much heavier......yet I'll bet they don't use the 100 pounders regularly so why draw this comparison. When double beasts feel too light.....which may take a lifetime....then worry about heavier!
With respect to explosive lifts/Olympic lifts.....doing a clean with a barbell usually the form breaks down after three to five reps and the stress on the wrists is pretty tough. Senseless to do a set of ten cleans with a barbell .....THAT is high risk. But doing double cleans with kbells can be done at higher reps....yes, yes it is not as heavy but look at it another way. A set of three power cleans with 300 pounds is a total of 900 pounds.....a set of ten cleans with double 40kg bells yields 1760 pounds.....yes I'm simplifying.
I enjoy when those guys tell me how worthless it is, especially the 300 pound benchers who can't budge a 40kg bell out of the rack for a press!
Bottom line is do what you can do and will stick with for the long haul. I recognize there are multiple ways of exercising and respect what people do as their choice be it crossfit, kbell training, Dumbbells, etc. but I pride myself on not crapping on their chosen exercise protocol.
I will close with this thought.....Ill bet the author has never really worked out with them the way we all espouse!