The primary advantages I see with DVC are flexibility, and the fact that this is Disney we're talking about. If you go to WDW or DL once a year for about a week, or go for a longer period every other year, you may find real value in DVC. Quality, value, flexibility -- that's why.
For more info, you really need to do a good bit of basic research on your own, because as you've seen, you are not going to get a flood of answers to very broad, general questions.
A good place to start would be the link above for Frequently Asked Questions. That will give you a good basic understanding of DVC. Also, call DVC and ask them to send you a packet of info. You'll get a video with practically no information, but you'll also get a book with a good bit of info. In addition to these two boards, you might look at
www.allearsnet.com and some of the other sites. You'll find a lot of repetitive information, but you will get some different slants occasionally.
Then, research the dues question (dues cover things like maintenance, reserves, taxes, etc. and they vary widely from property to property) and the differences between buying "new" direct from DVC and buying resale. Don't jump to conclusions based on prices which initially appear to be very low. Figure out the total cost picture.
Along the way, you will probably pick up what use year is, borrowing/banking, and many of the other basics. About that point, you will start to have some specific questions.
Once you get to more specific questions, you will find a LOT of help here and on the DVC Community Board. People are very willing to help -- they just don't know where to start until you get more specific.