Also as rmdev stated above, if anyone stumbles across this particular post I too import ALOT of data to my various sites, BUT I use WP Ultimate CSV Importer simply because it maps well to the fields of the DB including the custom fields from ACF. No need for urlencode and I’m normally importing 1000’s of records for my updates, no problems.
http://wordpress.org/plugins/wp-ultimate-csv-importer/
I also use Navicat because I can map to specific fields, but ONLY when I can deal with field(s) that I’m only updating data that is already there! Keywords are “data that is already there” as in update/append the field.
