4
I'm not sure how long "a while back" is, but phppp is actively working on this module and I can say that with this version, I don't notice any slowness. You may want to read the news articles he has written detailing the progress/change of each version.
As with any module/application/program, you may need to install on a test site to see if it fits your needs. Each server and XOOPS site is different.
As someone mentioned in a post yesterday, and I got quite a laugh from it and I quote
"But CSM is like underwear, Mine fits me perfect but I am sure most of you wouldn't want to wear it :) " Thanks, Gringo
The same goes with modules.
HTH