I agree to mike123acc.
Sending ONE newsmail to someone who has not agreed to receiving mails BEFORE (!) is definitely forbidden in the European Union. If the author calls it "service", he seems to be uninformed (or outside the EU) - it is SPAM, no matter what you call it.
In Germany especially you will get into big trouble if you do so! You MUST NOT put someone on any mailing list, if he/she has not agreed to be put into the list.
Use a newsletter-software that provides double opt-in; everything else will cost you a lot of money.

I use this component and I agree that it is very easy to install and to use. It runs beautifully and it is stable.
Normally, I don't like to pay for extensions (there is such a lot of well-done free things for JOOMLA), but this is well worth the little money!

But in addition to this, I want mention the perfect service Douglas will give you. I have jcomments running on my site, and MooFAQ did not support it. So I asked Douglas, if he could make MooFAQ run with jcomments. Within less than one day (!) MooFAQ was modified and I got a plugin for jcomments. Now MooFAQ runs perfectly with jcomments.

Conclusion: the component works fast and stable, service could not be better, and the guy is exemplary co-operative.