I attended a WD conference in NYC about seven years ago or so? I can't remember...it's been awhile, so certainly things may have changed since I went.
My experience was mostly positive. I was seeking traditional publication at that time, and found the pitch sessions to be very invaluable, as well as the information on querying/agents. I remember there being one craft session that was quite good as well. Self pub wasn't on my radar at all, so I don't remember there being much about it there, but WD does skew heavily towards self pub now (and sometimes the scammy/spammy services of self pub, which I don't like), so I'm sure it'll be there.
Overall, I found it a good conference for a beginner who's just starting out. I've also attended my state's SCBWI conference, the RT Booklovers Convention, and a few smaller ones. I found the WD conference to be on par with price and quality as my state's SCBWI, but not as good as RT (although RT was way more expensive).