I have, but have not installed DS4.5 - I am going to wait on that a bit as I don't beleive in installing the latest version of anything until it's deemed stable enough.
-AniMajik

I have DS4.5 Pro installed on my Toshiba Sattelite and as far as I can tell it is stable. If you have a different version of DS4.5, I would recommend downloading the Pro version now since it is currently being offered for free. All of my plugins are green except for AniMate 2. If you already have AniMate 2 in your versions of DS, there is an upgrade code available at DAZ 3D for it for use in DS4.5 Pro.