They're available now in x7, I bought them when they released last Wednesday and they're very smooth animations.
Once the pose has been made you remain like that. It would be nice if they blended them in so change from one pose to another, but then I guess it wouldn't be Yoga if things moved around.
I'm quite picky these days on any dance/pose LMOs but I am pleased with these and think Lockwood did a good job on them.
Lots of people have them. Anti-climatic after they been out a week. They seem to be popular.