I know people who use both together at the same time xD Mic -> beachtek -> zoom h4n / h1.
Beachtek alone means you're going to be plugging direct into camera, which improves quality noticeably. H4n alone + mic means you're going to be syncing in post, but the improvement in quality is definitely better (richer tones) than beachtek / juicedlink into camera.
My 2 cents