I made one with no batting, as I wanted it for a Summer Quilt. I really like it!
A friend did her long-arm for me. She said she thought it would have been better for machine quilting to have used a very light batting. She showed me several places that were hard for her to machine quilt, and she "goofed."
She said there is a light-weight batting on the market now for just that purpose. I haven't seen it, but she said you can get it at JoAnn's.
I made another one with a very light-weight blanket and it was fine. Either way for me. Also batting gets expensive.
Mariah