Normally, I am not one to jump in and try out a brand new extension. Especially one as potentially complicated as a new LMS. But, over the past couple years wrestling with Guru and the updates that would inevitably break something every time, and their road map continuously pushed back, and still not j3 ready, I decided it was time to make a change [special note: The site we are moving to LMS King was actually in prelaunch based on Guru - and still decided to make the change]. I purchase LMS King Pro & couldn't be more happy that I did. Not to say things are 100% perfect, or that every feature I could ever want is already in there, but it is heads & shoulders above Guru in just about every aspect.
First warning - there is a bit of a steep learning curve right in the beginning because some of the build processes seem odd at first. But, once it 'clicks', lesson/course development moves along very fast.
We are now transferring over courses and exams that are now much more powerful than we ever had with Guru in the same or less time.
Second warning - documentation is light. If you are looking for tons of videos and in-depth walk-throughs, they just aren't there yet. But, their support is awesome. I have bounced questions over at all times of the day or night & always receive a reply much quicker than I expect. So don't let lack of docs or walk-throughs hold you back!
These two warnings aside, LMS King is a seriously powerful LMS with all the question types we were looking for, and more. SCORM compliant. It even includes the ability to have students submit essay answers that are graded by a teacher or teachers assistant later. You have the ability to have not only teachers, but teachers assistants assigned to your courses. it's responsive, built on j3 from the ground up.
And, best of all. is the support. Phenomenal support!
So, if you are like me, and you actually enjoy [or at least don't mind] ripping through a new extension to really get it figured out, and you need a very powerful LMS ... then do like I did, step outside your comfort zone of buying a new/un-rated extension, and buy/try out LMS King.