It works very well, though it needs some time to get into designing a template. Some HTML/CSS knowledge is advantageous.
The support is great. toesslab - websolutions (toesslab.ch) is very concerned in helping. Just drop them a PM and they'll be glad to help you out.

A great Addon for all people having some users registered on their site.

This is a really great addon. Works great. The newsletter can be fully customized. With a little knowledge of CSS you can create a professionally looking newsletter. Color, transparency, frames, even shadow behind text can be set. Learning how to design a template and a newsletter requires some time, but once it's done, the effect is worth the effort. I really like the possibility of sending messages at the scheduled time and with the set amount of messages per hour. This is very helpful when your hosting has limits on the number of messages sent. Daenu support is really good and helpful in any ambiguity or problem. This is a great tool for enhancing the functionality of the website I strongly recommend.

Perfect add for a newslettertool
Ich bin froh dieses Tool entdeckt zu haben. Dies ist genau was meine Kunden gesucht haben.
Großes Lob an den Entwickler - perfekt welche Möglichkeiten von toesslab.ch hier angeboten werden.