I saw this in the AMEX app, and it seems like a pretty sweet deal. What I ended up doing was the 4-person plan (not family) which normally is $143.88, but then I used a promo code for 50% off first order: A-FPPARTNER50
So the total is $71.94, or $41.94 after the AMEX offer for supposedly 12 servings of dinner ($3.50 per serving).
I've never tried this, but Blue Apron and Hello Fresh were fine, so I imagine this one is too.
I found the 50% offer code from google.