The cost of that BOM seems quite expensive, I haven't gone yet and checked out the quilt though to see what's involved in it.
Regarding BOMs I love them. I've been quilting now for about 3 years and found the BOMs gave me a lot of pleasure and the ability to try different fabrics and different sewing styles, incorporating my love of stitchery as well. Where I live, fabric is expensive, so spending $25/month for a block kitted up to come in the mail wasn't costly. The BOMs I've joined have been through Pastimes Online (
http://www.pastimesonline.ca/ ) and we get tutorials, we get a video to work along with, and Valerie has become a friend over the course of the BOMs I've taken.
So to answer your question, yes, BOMs have been worth it to me!