Since they started the practice of asking you to look up your class schedule when you want the student pricing, I haven't been as much of a fan. A student ID should be enough.
Also, the last couple of yoga classes I have been to have been packed to the gills. We arrived 30 minutes early to get a good spot, but it didn't matter in the end because people kept coming. Even 10 minutes into the class, we all had to readjust our mats. I was about 5 inches away from the people on each side of me, making some of the poses difficult & making it far less enjoyable for me.
I may or may not be back after these experiences- there are other yoga places that I want to try out.