yes, byba opened recently. I am currently using my free 1 week pass. They have an interesting policy, if you purchase one class (at 55 pesos) the first time, you can attend for a week, as long as you don't stop. If you stop one day during that week, you loose it. I am not sure I completely like that, but it has motivated me to go for 5 days now.
It is very expensive, 580 pesos a month to be exact (and you can go as often as you want), but that is triple what a normal yoga studio charges in the same area, so be prepared to spend money if you go there, even for water, they charge 2 pesos to refill a bottle of water!
I can't compare the teachers with others since I've only done normal yoga before. I like the fact that it is hot, it helps relax my muscles, but I am not sold on the idea that every class with every teacher is identical. By the way, they have classes in English at 1:30 PM.