Which LMS do you use and why?

My current employer is preparing to begin online courses using Moodle 2.0. The director chose Moodle because it's free. At the time of discussion, I asked that they wait for version 2 rather than install 1.9, as several features came out with version 2 (activity completion, for instance--a huge plus) that weren't available in earlier versions. Though I've worked with the front end of the system much more than the back end, I find Moodle a great LMS, especially if you don't have the dollars to fork out. I'm also beginning to work with Blackboard, though, and it appears to be a super option if you DO have some $. Seems it's improved a lot since I worked with it in grad school. I've been experimenting with it using the free CourseSites, and it's pretty sweet in terms of ease of use and options available.