Which LMS do you use and why?

I've used both Blackboard and Moodle.  Comparing the two on features and ease of use, Blackboard definitely gets my vote. The hosted version is rock-solid reliable and course creation and content deployment are fast, user-friendly and intuitive. I haven't used Moodle nearly as much, but from what I have seen, it seems far more labor intensive and the interface seems far less intuitive. Blackboard also seems to have more and better no-additional-cost training materials than Moodle (at least within the last few years) although that hasn't always been the case. The linear structure of both, however, without customization, seems more aligned to academic rather than professional training environments. Moodle is, however, far less expensive to use and thus may be the better choice for smaller or start up projects.

I've also had some experience with the Ecollege platform and it seems to have some very nice standard features (i.e., a synchronous online classroom capability that is VOIP and desktop sharing enabled) which seem to be available in other platforms like Blackboard but may come at additional cost depending on the license selected.

If anyone has experience with an LMS designed specifically for professional or association training and education (as opposed to academic course delivery) I'd be very interested to learn more about that.