I have taken live classes too but I didn't like them as much because a lot of it is really hard but not in a workout way. There is a lot of sitting with your arms straight up over your head and chanting and I am not a fan of that. But, I did find that learning the chants and doing them on my own is really calming if my mind is buzzing.
Yeah, this is true.
I wouldn't say Kundalini isn't physical, it can be very physically challenging but as LazySmurf says in a different way than other yogas. I find Kundalini builds the will and teaches you to move beyond physical discomfort and use meditation as a focus to get through difficult things--hence exercises like keeping your arms in the air for a long time while chanting or doing a specific breathing pattern--it's training you to switch to a strong mental focus and move beyond exterior discomforts and stay on course. In the broader picture, I believe this sort of training can be applied to life and I think that's one of the philosophies behind it, or at least that's part of my understanding of that one facet of it.
I've been practicing it on and off since 2002 and I think if I had to pick one yoga to practice forever, Kundalini would be it. I really like Ashtanga and vinyasa yogas too though. But yeah, Kundalinia is not for everyone, there is talk of chakras and stuff and some chanting. Our instructor more or less explains briefly what the exercise cycle we'll be doing that particular day will be working on, it's not a sermon or anything, just a brief talk about what Yogi Bhajan says these particular exercises will benefit.
I personally find Kundalini yoga to be very helpful and have found it to be a great stress reliever that does indeed build the will, helps me stay calm and enhances focus. I also find the meditation and corpse pose period to be longer in Kundalini classes and I think that's excellent because meditatation is very beneficial and I have some trouble with it, but the extended period of relaxation after the physical part of Kundalini class helps me with that. Also, practicing Kundalini has helped me understand the benefits of meditation more than any other style I've tried and has given me better tools to work with to get me to that place.
Anyway, I'm definitely a fan but I think as a yoga style, it can be somewhat of an acquired taste. If I need to do something I think takes courage, I always try to do a Kundalini session the day before because maybe it's a placebo effect, but I really think it helps. <3