(1) When staying at the Orlando units, do you get the same benefits as patrons staying at the Disney hotels (i.e. special exclusive late & early entrances to Disney parks, etc.).
Yes, DVC guests are offered Magical Express (airport/resort transportation), Early/Evening Magic Hours and use of all Resort ground transportation (busses, boats, monorail).
(2) Do the units have full kitchens (including refrigerators, stoves, etc.)?
The 1BR, 2BR and 3BR each have a full kitchen. The Studio units offer only a mini-kitchen with dorm-fridge, microwave, toaster, etc.
(3) For owners in the vacation club, what is the most popular child-friendly home resort near Disney World? (a) approximately how many points would be needed to book a 3 bedroom unit for 1 week in February at this resort? (if no 3 bedroom units exist, what about a 2 bedroom), and (b) approximately how much in annual maintenance fees would one have to pay for this many points?
I'm guessing Bay Lake Towers (BLT) might be most popular for families with small children as it is closest to the Magic Kingdom. Many families walk from BLT to the Magic Kingdom - but this might be influenced by how many of the children are passed-out-tired and need to be carried?

Families with older children might enjoy the theming of Wilderness Lodge and the ease of riding a boat from the resort to the Magic Kingdom. Others prefer Beach Club Villas because of the swimming complex, Stormalong Bay.
A fun way to determine number of points required is to use the Points Calculator on David's Vacation Club Rentals at:
http://www.dvcrequest.com/
This will allow you to play with different size units and dates to monitor impact on point requirements.
Assume maintenance at about $5 point. Some resorts are higher, some are less. The maintenance fee is based on the resort(s) you
own -- not where you use them.
(4) Does the vacation club also offer multi-bedroom units in resorts near Disney Land in Anaheim?
Yes, there are DVC units (studio, 1BR, 2BR and 3BR) at the Grand Californian -- but not many. I believe there are 48 2BR equivalents (where a 2BR can be broken into 1BR + studio) and two 3BR units.
(5) Are you happy or unhappy with your membership? Is there anything you wish you had known before you bought?
Often I tell my husband that DVC is my favorite thing to hate. There seem to be lots of little things that get under my skin -- but the feelings don't last long. Overall I'd say neither happy nor unhappy. It is 'ok' and does the job for which it was purchased.
There is nothing I would have differently regarding our purchase(s) -- but do be sure to research the following topics before buying:
- Use Year and its impact on Banking points and canceling reservations.
- Direct vs Resale: last March introduced some restrictions on how Resale Points may be used. These restrictions may or may not cause you concern.
- Home Resort vs non-Home Resort booking windows and strategies.
- Banking/Borrowing rules.
- Transferring points - only an issue should you be interested in renting points from other members?
- Reservation Cancelation policy and 'Holding' points.
- Using points to book non-DVC locations and associated fees, rules for cancelation, etc.
- Home Resort -- which one(s)??
- Small contracts vs large.
FWIW, we own three small contracts at Disney's Saratoga Springs Resort (SSR, in Orlando) all with the same Use Year. In eight years of membership, we've stayed at SSR only twice. We've had little to no trouble booking our stays at other DVC locations using the points from SSR -- except for the Villas at the Grand Californian (Anaheim). The limited number of units at Grand Cal have made it more difficult to book without home resort advantage -- but I'm finding much greater success since DVC's Online Reservation System was introduced this past January.
Overall, I'd suggest viewing DVC as a boutique product to be used
only at DVC resorts. If you would normally book Disney Deluxe Hotels on cash you might find using DVC a cost-effective tool for staying on Disney Property in larger room types (1BR, 2BR, 3BR) with full kitchen, laundry, etc.