Any problems those who have it ?

I love Poser Pro 2010, but if you search through the first 5-8 pages of this forum I am pretty sure you are going to get about 10 threads outlining what people like and dislike in it as well as the problems they are having. There has been a lot coverage of that exact question!

You are asking two questions, so here are my two answers:

Yes, it's very good, the best version of Poser yet in terms of its usability, capabilities and quality of output. (It has to evolve and get better, or it would die).

Along with Poser 8, it's a newly developed product, so yes, there are some teething problems (see many other threads, as mentioned above). I have not had any major problems with it myself, however.

Have you used Pro inside 3DS max by chance? The previous pro version was just awful in there and it was more of a gimmick than anything else.

Sorry, I only use Poser as a stand-alone product. It's probably worth searching for that specific subject in the Poser and 3DS forums (if you haven't already), or raising a thread with a more specific title to attract those who do use the 3DS interface.