Thank you very much! Yes, this will just be the beginning and we'll strive to create more intuitive and advanced addon for Joomla! Our main goal is to allow more users to use Joomla for all their site needs!
From your post on our forum, I realize you have been testing a 3 month old sh404sef version. Our plugin for MyBlog is currently absolutely up to date.
More generally, you should consider the following :
1 - from your forum post, I understand that "works not to 100% correct" means "all urls are not made SEF". That's not what we are trying to do, but only turn SEf those urls that requires it - see item #2 also
2 - it does makes sense to have some of the messaging urls to be sef. Urls are not made SEF only for search engines and SEO results, but also for users. Though I usually try to have as few SEF urls as possible, there are exceptions and private messaging can be one of them
Thank you for your positive review anyway and all the best