Lots of good comments here. Ultimately, the "worth" is a value proposition that has to be answered by the individual.
DVC is not an "investment," it is not, by any means, the cheapest way to enjoy Disney. DVC is a prepaid vacation plan that is most appealing to large family/groups and/or people who stay at deluxe resorts most of the time anyway. If you're concerned about getting the best bang for your buck you're likely not staying in deluxe resorts or possibly even on Disney property. The "worth" is a personal decision in this regard.
Speaking purely financially, I think some folks jump into a purchase too easily. It's a large cost (both upfront and ongoing) with downstream impacts. Looking at it purely mathematically, you're not just losing the money through the purchase and maintenance fees, but you're losing the opportunity cost of what else you could be doing with that money (investing it, etc.).
I know this is a touchy topic and each person family ultimately has to make this decision for themselves, but I would make sure the following topics are covered in full before I would even consider such a large purchase:
- Am I in debt? (CC, student loans, cars, etc?)
- Am I properly saving for emergencies (ie -- emergency fund of sometype?)
- Am I properly saving for retirement?
- If applicable, am I saving for my kids college needs?
- Can I pay for DVC in CASH?
- Are the ongoing maintenance fees + the costs of the trips (travel, food, tickets, etc.) within an acceptable and maintainable annual vacation budget?
FOR ME, if you can't answer all of the above in a positive light, then you likely shouldn't buy DVC. This doesn't mean you can't have vacations or even go to Disney, but there are much more economically sound ways of enjoying down-time if you're buried in debt, have no retirement hopes, etc.
Vacations alone are a luxury item that many of us are blessed to do. DVC is a luxury on-top of a luxury and as such should only be pursued, in my opinion, by those "well enough off" to handle the cost while still taking care of themselves/families financially.