I need to get back to it -- I stopped about six years ago (long story, had a massive upheaval/life crisis), but before I stopped I had been doing yoga on a regular basis for about four years, and I really loved it.
I found that it increased my flexibility, strength, balance, coordination, and it even toned my figure and trimmed me in a few inches by toning muscles. My shape changed subtly. I really like the increased strength too. Just holding some of those poses kind of works your muscle tone without even doing much but holding the posture.
I also felt calmer after a session. It's a very restful thing to do, mentally and emotionally.
I did it from a DVD made by a practicing instructor, so it felt almost like taking a class from her. I'm strictly NOT a "joiner" so I hate actual classes and having to schlepp to one, or go to a gym.
I'm no good if I have to go somewhere and be in a group of people -- I've rapidly given up anything I've tried that was like that. Yet when I got this DVD I kept up my yoga for years, doing it about every three days.
I only stopped because a sh!t-ton of disruption happened in my life; I had to move four times in eleven months, my life went upside down and I still haven't reinstated some of my old routines and ways of life, which is not a good thing. I dearly want to start back on my yoga but I'm battling a lot of inertia and not coping well.
A DVD works best for me because I can follow it in the privacy of home. The one I used was by a woman called Barbara Benagh, and she seems to have years of experience teaching. She has a soothing voice and I really recommend her DVDs.