In reply to Bryan Hoffman.

I've used ACF a few times on request, but by choice I always use CMB. The code-base in CMB is far better. The code-base in CMB2 is on par with the original IMO, but it has improved functionality, so generally seems to be the better option to use.

For very simple meta boxes, I still prefer to do things the old fashioned way though (via hand-coding every thing).