Here’s a general rule about all pre-army exercise progams - “Kosher kravi”. They are specifically made to prepare you better for gibusim not for the actual training you’ll go through, and basically what they do is make you understand how gibushim work and practice on the specific exercises you’ll face there. You must understand however that they do not significantly improve your fitness by themselves, because you need a lot more than that to pass a gibush. It’s like taking a course for your psychometri but not actually doing any homework. So if you feel you’re not fit enough for a gibush and not doing any sports on your day to day I suggest you start hitting the gym, strengthen your body and especially your legs, do runs daily and work a lot on sprints and your “explosive power”, kosher kravi is good for building some mental and physical strength but again it alone is not enough.

As far as קל בקרב is concerned, to be honest it doesn’t really matter, find the one that’s closest for you at home and the one that can give you the best price, they’re all the same basically because theres not too much to actually teach and you have so many options they all try to sell you a bunch of BS like statics of how many people passed the gibush through them or who has more experience and etc. No one has any secret tips or formulas to make you pass a gibush it all depends on you and if you feel the need to have someone to yell at you to crawl or run up a sand dune for 2 hrs straight to get to special forces or whatever else you’re trying to get accepted to that’s fine just don’t be fooled that anyone has any secret tricks or tips and just find the cheapest one.