Yeah it's actually really bad. Besides the absolutely awful framerate, the amount of weird looking wooden pathways jutting out all over the place constantly block the camera. I didn't have too much issue with the enemies besides the dudes that shoot toxic darts at you, easy to get hit by one of those without seeing it.
But the level design is terrible. And again, the framerate renders it almost unplayable at times. If the framerate was stable I could probably tolerate everything else as an annoyance. Seems like a good place to quit and hopefully move on to a slightly more refined game in DS2. Definitely makes me scared to even bother with Demon Souls though.
Dark Souls 1 could definitely use a remaster that adds fast travel and fixes up the framerate on that area and any others that drag it way down.