Which LMS do you use and why?

We officially use SAP LSO for our LMS. I don't recommend it at all. It's big, expensive, and isn't user friendly AT ALL.

With that being said, I'm working on moving us over to Moodle 2.1 now. A small segment of our company doesn't have SAP access so we implemented Moodle to track their courses. We like it so much more than SAP that I'm making the business case to move the entire organization to it. We had a custom SCORM report built by a Moodle partner to give us better reporting. I also hear that version 2.2 (due out in early 2012) will have more robust SCORM 1.2 reporting. They're still aways off on SCORM 2004 compliance. We run Articulate and Captivate courses via Moodle and haven't found too many problems. I love the community and, after dealing with the costs associated with SAP, love the accessibility and expertise of Moodle partners.Outside of the SCORM support, we love being able to include things along with the course package such as discussion forums, or even just job aids outside of the course. This is something we don't have with SAP.

I agree with others who have posted about needing to evaluate your needs and pick a suitable LMS. Moodle may be open source and "free" but you need to have support inside your organization for the administration. As with any LMS, there's a learning curve. Otherwise, hire a Moodle partner to help you with that.