I have D:S Advanced, but I hardly ever use it; most of my characters and scenes were made using Poser's material shaders and lights so importing them into DS is a non-starter. That, coupled with the lack of python script support which I use a lot, mean DS gathers a lot of dust on my hard drive.
I don't see anything majorly wrong with it; but it doesn't work well for me. Stability wise, I would say it's worse than Poser, but  that's not really saying much (PPro has been the best stability wise thus far of all the version I've used).

I usually recommend newbies to start off with DS just because it's free, but to move up to Poser because of the better support and advanced features (IMHO). Poser is still the standard and I don't see that changing anytime soon.