it is easy to customize and works good. Although it is free, they even offer a good support. A minor down side is that after an update you have to reload your language file, but thats ok.
MailChimp Addon
MailChimp is an excellent tool to create and manage email marketing campaigns, and this add-on can facilitate precisely that. Once a user signs up, it is added to your MailChimp list, and then all the communication going out from you can be tracked via MailChimp’s dashboard. With this add-on, you can also add your previous users to the MailChimp mailing list to keep track of all your old and new users.
Key Features
- Single/Double user opt-in with verification.
- Custom opt-in message.
- Settings for each Registration Form.
- Merge fields and Map fields to Mailchimp by form.
- Import users in bulk by form.
- Admin receives an email if the user registering fails to subscribe for any reason.
- Admin can download a CSV with errors for users who weren’t bulk imported.