I’ve read comparison reviews (against ALS) of the 5170 that mention the Chrono is harder to engage (vs ALS). I’ve never handled an ALS so I can’t compare, but my 5170 is extremely smooth and easy. It engages faster than my Omega 321 reissue or PF chrono, but doesn’t have that crisp bite the 321 or PF chrono has (not necessarily a negative).