CSV Upload question

Mark I have an interest in using Turbo CSV which I am told will create categories and tags based on the upload. They have a bit of a disclaimer about using custom fields. Please take a look at this and let me know what you think:

TurboCSV is compatible with WordPress 3.0 and higher. It requires PHP version 5.2 or higher.

“TurboCSV fully supports WordPress custom posts types, taxonomies and fields. However, some custom post type / field plugins use proprietary tables that are not compatible. If you are using a plugin to create custom post types or special fields, please check that it is fully compatible with data imported into standard WordPress tables.”