Which LMS do you use and why?

We have just acquired an LMS after not having anything.  They chose Absorb, which someone mentioned previously.  The cost really waan't all that much, but we are not hosting it ourselves, so that might be why.  While there are may great things about Absorb, such as very user friendly, there are still some major challenges.  There is no consistant and easy way to track absents ro now shows and studnets cannot un-enroll them selves from a course.  Granted so far, those have been our biggest issues and when you take that into consideration, that isn't bad.  I can say their support tema is pretty good, they have been listening to our needs and really trying to help us find ways to fix any issues.

As someone also siad, there isn't a perfect one out there, but if it comes along I will definitely be willing to check it out.  In most cases I do find it is really how the course itself works with the system.  Lately I have found that the authoring software doesn't always work the same way with different LMS.