I run a school multisite in Israel - that is in Hebrew.
A few months ago I was asked to make a newsletter for the school community, and I set out to look for a simple plugin which would allow me to send newletters to all the community members, in Hebrew, from a site other than the main site, without any hastle.
It has taken me weeks of installing, configuring, trying out, trying to make it work and then uninstalling half a dozen plugins.
Until I installed this one.
Not only it supports Multisite - but it is so easy and intuitive. And when I had a problem with it, the support was instantaneous and thorough. Way to go!
The only thing which is a bit a bother for me is because I work in Hebrew: while making the newsletter, the writing in the back-end page displays as a lfr paragraph, and it is inconvenient. I need to manually change it to rtl every time I edit, a bother. However, the newsletter sends out correctly, so it is not a major issue, just one to perhaps take into account.