I haven't used this particular model in but a couple of renders, but I must say, it's quite impressive. I'm still trying to get used to doing expressions with it (and M4 in general), since I'm used to using Terai Yuki 2 most of the time lately..

 

Currently using Poser Pro 2012 (Display Units = feet)

AMD Phenom II 3.2ghz (6 cores)

8gb RAM

Windows 10 Pro 64bit