As with any credit card, whether or not the Disney Premier Visa is "worth it" really depends on your lifestyle and spending habits. As far as perks go, there are certainly better options with other travel cards - Southwest, Capital One, etc. Depending on how often you travel to Disney, I'd suggest that perhaps a different travel card might be a better option - it might be a better savings to be earning airline points, hotel points, etc. rather than Disney dollars.
I've been a Premier card holder since 2012 (I think at the time they only had Premier - no debit and no other type of credit). Also, it's been awhile, but I recall that back when I signed up, the first year $49 fee was waived - I haven't looked into the latest sign-up benefits, so I have no idea if this is still applicable. At the time it worked well for my family's Disney travel habits because we would visit Disney World several times a year and book a Disney hotel through the Disney website (if you're booking through Travelocity/Expedia/etc. I don't think you still get the double points).... that's a good bit of Disney dollars right there. Also, we never booked the dining package, so it was nice to have the discount on food. I think they've since cut back on which restaurants get the Disney Visa discount... my dated information serves only to prove the point that it may well work for some "Disney styles".....
But if rather than booking a Disney resort through Disney, you typically stay off-site or rent DVC points... you don't have that automatic double point from a significant cost of your vacation. So it would be better to book that with a different travel card that automatically rewards you double (or more) points for any sort of vacation cost.
However this is the
Disneyland board, so maybe you're an AP holder who visits regularly - in which case you'd be accumulating double points for food and merchandise purchases.... and more if you put your AP on your Disney card.