I don't have, and have never used, the M1. I am very pleased with the CDS for my application though. I have my own limitations on range for hunting based on the limited amount of longer range field shooting I get to do throughout the year. The CDS is a very easy way to add a level of precision out to 500yds (my range). I also like the lower profile and the zero stop. I trust the opinions of those who prefer the M1 for their application, but the CDS is also very good for it's intended use.
