Let's start with what Kundalini yoga is. Kundalini Yoga as taught by Yogi Bhajan is called the yoga of awareness. You start a class by tuning in with mantra and then move into a pranayam, followed by a Kriya. A Kriya is a sequence of Asanas or postures set up in a particular way to move the flow of energy around your body. There is a Kriya for everything. After the Kriya you move into a meditation, sometimes with mantra, sometimes without mantra. The Kriya that you went through prepared your body for the meditation, and just like there is a Kriya for everything there is also a meditation for everything.
For me I find Kundalini yoga to be a lot more strict then other types of yoga, and for me I found it to be the most life changing. I believe that when your energy within your body becomes stagnant it can cause the world around you, your own reality to feel stuck, to feel burdensome, and to feel uncomfortable. With that being said, that is why I think Kundalini yoga is so effective. It's taking something that you have never done and making you do it for uncomfortably long periods of time. That moves the energy and changes patterns or habits.
I also love Kundalini for the sound, for the mantra. Nothing centres my being more then long chant. I feel myself become apart of that which creates worlds when I chant, the sound cuts through my ego, I can only hear and sense my soul. There are 84 meridian points on the upper pallet of the mouth. As you stimulate each meridian point, it sends signals to the hypothalamus. The hypothalamus programs the chemicals that go into your brain. It is connected to the pituitary gland by blood vessels and regulates moods, emotional behavior, sexuality and even physical things like hunger and sleep. It's pretty scientific, but I can assure you it feels amazing.
“Every element of the universe is in a constant state of vibration manifested to us as light, sound and energy. The human sense perceive only a fraction of the infinite range of vibration, so it is difficult to comprehened that the Word mentioned in the bible is actually the totality of vibration which underlies and sustains all creation. A person can tune his or her own consciousness into the awareness of that totality with the use of a mantra. By vibrating in rhythm with the breath to a particular sound that is proportional to the creative sound, or sound current, one can expand one’s sensitivity to the entire spectrum of vibration. It is similar to striking a note on a stringed instrument. In other words, as you vibrate, the universe vibrates with you.” ~Yogi Bhajan
So if you are asking the question why would I try a kundalini class, my answer is why not, go to a class and test it out. Judge how you feel, maybe not in the moment but after the class. There are so many benefits to doing yoga that it doesn't hurt to try.