Yeshiva Chaim Berlin is the pre eminent yeshiva in the us with the gadol hador as its Rodsh Yeshiva and a staff of gevaldige talmedai chachomim. its record speaks for itself and lucky you are if you go there. (and the gashmeos there is world class too).
Are you talking about the yeshiva ketana (elementary), Mesifta (high school) or bais medresh? While there is a common theme running through out, it makes a difference on what you want to know.
In General Yeshiva Rabbi Chaim Berlin is a wonderful Yeshiva with amazing rebbis. However, in every yeshiva you will, unfortunately ,find some bad apples. My sons are in Chaim Berlin and I have no regrets in sending them there.
Chaim Berlin is a good place if you are a good learner who intends to sit and learn for a long time. If you’re not the greatest learner, and have a hard time sitting through a seder, it’s not for you.