I have been in a 590 break since 2004 and wanted to give a 580 a try last year and won't look back. It does take some adjustment though. I will only use a 580 style from now on. For what its worth, the newly publicly released vapor 90 is almost identical to a lefevre 580 minus some things, but the feel is spot on. Hopefully by the end of next month I'll be able to post a true, ccm, and Bauer 580 side my side and their closures.