I know that all developers do not approach every component in the same way, however; having been a Joomla developer for over three years, I have to admit that this product is worth the investment!
It is easy to use once you spend a little time with it and overall jNews works the way I would think a newsletter component should.
For those of you out there that are using the 4.0.2 version, you need to update to the 4.1.2 to see the real potential of this component.
Need to save $'s in a tight economy? Well, think about it: You can pay through the nose for services like Constant Contact, or Mad Mimi, or you can use a very flexible component like jNews.
Besides, your email list should stay within the confines of your own site.
Lastly, iJoobi's support is un-paralleled by the current standards of third party plugins and components I have experienced.
I would recommend this product to any serious web developer or webmaster.
Thanks iJoobi! Keep up the great work!