I showed up as a walk-in for just one morning in February.  The lady was very nice and helped me with the mat and towel I hadn't brought.  Everyone seemed a bit reserved but still welcoming.   We were packed a bit tight but, from the comments I overheard, that doesn't seem to often be the case.\nI think hot yoga is a crazy concept / form of punishment but, as far as the people and facilities at Sumit's, it was very nice.\n\nThey had a changing room and I think they also had a shower - would be convenient to go straight into work if you were a regular.\nMy phone mapping app didn't quite get me there.  Close enough but had to go to the back of that mall, close to the Whole Foods or health food store.\n\nSide note: If you are visiting Phoenix, trying to get to Taliesin, do NOT trust your phone mapping apps!  Print something ahead of time!