I signed up for BOM at my LQS and was not happy with the fabric that I got to do the particular blocks. It seems that they were sloppy when cutting the materials and I never had enough so I quit after the fourth month.
I am doing a free BOM from Craftsty.com that I am having a lot of fun doing. They do not take a lot of time and it easy to keep up with the blocks. Amy is a very good teacher and explains different methods of doing the blocks so you have options.