The newsletter tool works fine. The support is there, that's for sure. But the highly promising SmartNewsletter is simply not working. After having been in touch with several supporters at joobi and after having received three updates (although without changelog), I finally have to give up: SmartNewsletter is not ready to be promoted at all. The sending is very, very unstable (say: not guaranteed at all), the building of a new SmartNewsletter shows quite quirky behaviour with unsure outcome. I'll give it a two-star-rating: 4 for the regular newsletter tool, but a straight minus for the promotion of an extension thats still under development.