I have to admit I haven't used it much in years. I never really connected with it, despite it being the standard recommended spread when I was first learning. I found some of the positional meanings to be unclear for me: root/"beneath you," or "environment," or "crowns you." It's also quite long, so I mostly ignored it and gravitated towards 3-7 card spreads instead.
Recently, though, I came across Biddy Tarot's description of how to read it, and something about her version finally clicked with me. I like the above/below positions as wants & goals vs. what's subconsciously driving you. The bottom of the column as "advice" is great, as is "external influences." Her descriptions on how to compare pairs of cards was especially enlightening for me. It's nothing revolutionary, but it just finally makes sense, and actually seems practical. I'm not sure why I had such a block about the darned thing, but I'm looking forward to using it more now.
I also agree with the others about it just being kind of "out of style" at the moment. In addition, the whole world seems to have a short attention span these days, so it's not surprising that people are choosing shorter and more direct spreads.