Yes.   I do use Poser 7, with V4, and use the BodyStudio plugin version 2.7.02c to import into 3ds Max 9.

It gives very good results, and allows many more possibilities for rendering, however it does not do a good job of importing procedural textures or multiple shader trees.  So as one of the other posters commented, there is an element of fiddling with texture nodes before, or after transferring to Max.

Overall I think it is worth it.  However I should state that I am doing this only for my own amusement, and if I was trying to produce high quality art as quickly as possible, then I would probably find a different route.