Which LMS do you use and why?

Lots of good feedback here about LMS's.  I find it interesting that there are few to none who have mentioned using Articulate Online (AO)  and I was hoping to hear more about AO.  We are still searching for a user friendly  LMS to replace Taleo and my original thought was to consider AO so we could have a "one stop shop" for design with Articulate/Storyline and publish directly to AO.   As I search the community for AO comments, there doesn't seem to be much out there and what I do see is a lot of " sorry that feature isn't available now but you can submit a request ...."  Which prompts me to ask the moderators " Is there a new version/update/replacement in the works for Articulate Online? and if so, how close are you to rolling it out?  I'm keeping an open mind and researching other solutions but I would still prefer a one stop shop with 100% Articulate product support.