Down sleeping bags have been my choice for many decades for backpacking, kayak touring and bike touring. Ten years ago I read about Nunatak down quilts and ordered one. I no longer have any traditional sleeping bags. Many of the complaints or concerns about quilts are easily addressed using a UL bivy or a wider quilt. There is a short learning curve in adjusting to three season quilt use. The quilt advantages I quite like are reduced packed volume for the same level of warmth and lack of confinement in a mummy type sleeping bag. Quilts are a great improvement for me and maybe for others.