This place is awesome. As with most people, I found this little place through Groupon and I am glad I did.
I bought two Groupons and had no problem scheduling a saturday class for me and my friend for the 2pm saturday class for the pottery wheel. A lot of the reviews I am reading are complaining about scheduling or Groupons not being honored. Groupon is an an incredibly popular service. If you call in advance of when you want to go, and don't wait until the last minute, scheduling anywhere with a Groupon is a breeze.
This place is no different. They aren't beholden to honor your expired Groupons, you are responsible for scheduling in a timely manner.
We loved our class, and are awaiting the drying time so we can go back and glaze. This class was seriously so much fun, that I am considering buying a class for 4 when my mom and sister come out to visit. Good fun!