I bought both the other library managers initially (maybe because I had poser 8) and the semidieu one I still use when I want to load in and conform a huge folder of stuff all in one hit and it is also really really useful and good.

The great thing about the poser pro 2010 one is that it scrolls through my stuff really really fast.  I can absolutely zoom through a very long list of runtimes.
I've got it set up so the icons are the size I want them and I can see folders too.  And as long as, during scrolling, well actually at the end of scrolling, you make sure the mouse curser is actually on the scroll bar before you let go that mouse, then everything is fine and very very rapid, considering the extremely huge number of external runtimes that I have. 
I tend to use the poser library the most frequently because it is always open in poser and ready to go.

Love esther

Agreed!

Working with a dual monitor setup it has been a real boon and made working with Poser so much easier.

Lucky, sadly I am not having the same experience so I don't use Poser Pro 2010 at all. The library is sluggish, slow and cumbersome to me and unusable for the way I want to use it. If I use PP2010 I just sort of use it as a final render option but most times I don't even do that.

 that's really odd.  it is really fast for me. It absolutely flies.  I can email you screen caps of my setup of the libraries and what I do to load content  if you like.
The parameters dials on a fully morphed V4 are sluggish for me, but the library is fine.
Love esther

Glad to hear it Esther! I've liked it since BB's first version came out. His improvements really made it better too.