We just don't have enough facts to gauge whether this is a good deal or not.
-Who is the famous quilter?
-Is the fabric kit included or not (the way you worded your post can be read both ways)?
-Is lunch provided?
-What extras are they giving away with the cost of the class (e.g. books, patterns, fabric, etc.)?
-How long is the class?
-What is the maximum enrollment in the class -meaning will you have a lot of one-on-one time with the instructor?
-Are sewing machines/equipment provided or do you have to bring your own?
-What is the topic that will be taught?
-Is this an advanced level class?
At the end of the day, I agree with the others that say that if it is worth it to you than go for it. If it isn't, then don't, regardless of who the quilter is. For example, if Edyta Star came to my town, I wouldn't be interested in her class. Her aesthetic is just not my vibe. But she is a funny, witty person who makes beautiful art and I can understand why others would love to take a class with her. So I would rather not sign up for the class which frees up a spot for someone really excited to learn from her.