In the past 7 years I've worked in a variety of settings applying health, fitness, & performance based training programs. I'm often asked if a popular or trending fitness program is "good" or "bad". I've never been able, or felt compelled to give a straight simple answer...not because I dodge or work around questions like a shifty politician, or because I don't know, but because there really isn't one in most of the occasions I've been confronted with. This is because the answer all depends on what your individual goals are. Once I can get a better understanding of what someone is trying to get out of their time spent training, and their lifestyle, I can then say X-program is good for that, or Y-program is a waste of your time. Not everyone has a coach or trainer at their disposal, so if you're not sure, and in no position to consult someone who can help you, then use the good'ole scientific method, and be guided by the wise words of Bruce Lee:

"Absorb what is useful, discard what is not, add what is uniquely your own."

- Bruce Lee

Most gyms will offer free trial sessions, and low-cost entry level memberships for you to try-out a training program. If your goal is weight loss, then you've got some pretty clear, quantifiable, and identifiable variables to analyze that training program's effect on your goal. You can read yourself stupid Googling about what training program to do to reach your goals and get nowhere with the confusion. My point is that sometimes you just need to try, execute, and absorb what works for you after trying. After experimenting and observing what works & what doesn't for you, you'll have so much experience and proficiency that you'll be empowered by your process, and even compelled to add something uniquely your own!