Best for mostM. A. Screech · 1991
M. A. Screech's Penguin 'Complete Essays' is the one I'd start with — idiomatic, engaging, and built on the most recent scholarship while staying faithful. The most enjoyable complete Montaigne to actually read. This is where I'd start.
Most accurateDonald M. Frame · 1957
Donald Frame's translation (Everyman's 'Complete Works') is the acknowledged classic — accurate, sensitive, fluent, and it includes the travel journal and letters too. The scholar's standard, a touch smoother than Screech.