I'm self-taught and don't really have time for classes because I still work full time. Plus I'm just not really a "class" person. I have taken two classes from nationally-know and award winning quilters and both were a total waste of time and money.
One was a class to get ideas on how to quilt your tops, based on the piecing and how the quilt was going to be used. It ended up being a class where she spent fully 75% of the two hour class time talking about her family, her grandkids, and upcoming trips with the family and grandkids. I was livid but it was the first class I had ever attended and I thought they all went that way. I found out later that this was not how it was supposed to be. I think she could have been a very good teacher based on the bits she actually stayed on subject but I'm not inclined to take another class from her again.
The second class was advertised as a way to learn to piece faster and more precisely. I should have known... it was simply a way for her to sell her very block-specific rulers and cutting tools. I only paid $35 for the class but she was a horrible teacher, even if you had her tools. She kept getting flustered and could not properly demonstrate her own rulers and tools!!! She was snippy with some of the people who had questions, but at least she stayed on the subject. After these two classes, I'll stick with You-Tube videos and spend the money on books.