Guru had promise but it has become bloated.
I have been using Guru since 2012. There are some good aspects, but some basics are missing. Guru could be a dominant LMS, but there are a few things lacking.
One glaring aspect is the library and the course layouts. Just about everything it does can be done with JCE (Joomla Content Editor). They spent way too much time on it when they could have spent time on other LMS type features.
I have +35 clients that could use Guru, but a course import/export feature does not exist. The clients also need better student reporting.
It is soooo close.