I used Quilters Dream 100% cotton for the first few quilts I made since I started back quilting last year ( I took a 20 year hiatus). I loved how nice it was to work with. The last quilt I made, I used Hobbs wool. I became a quick convert. The wool seemed so much lighter by weight, the quilted areas had more definition, and I think it just looks nicer. Wool does cost a bit more, but considering it takes me 6 months to finish a quilt (I work full time), I don't have to think about it often.