If you've ever been in a DG dust-up with a Jones-underlever hammer extractor double, you wouldn't have to ask this question! History has proved the hammerless top-lever ejector to be the ultimate development of the double rifle, as is reflected in their price!

(ps: hopefully I haven't just turned this thread into another ejectors vs extractors arm-wrestle. Just my humble opinion, but backed-up by at least a little experience, and market value!)