K, so, WP All Import is a decent choice. The problems I was seeing had do to with code and/or file caching. If you try WP All Import and your seeing problems importing the same data into multiple fields you’re probably running into the same thing. My web host has XCache installed and this was the culprit.
If you can add php settings you your .htaccess file you can add this:
php_flag xcache.cacher 0
WP all import may be lacking is some areas, like importing custom data for taxonomies and terms, but it will get the data into posts and custom post types. You also need to import files and images from URLs to get them into ACF fields as it does not work from files, but that’s a small detail.
