Hi, Ryan!
I've purchased two PhotoPass+ packages since they've been offered, and have been so happy with each one.
You may upload your own photos to your account, which is a wonderful way to be sure that all of your favorite photos remain in one place as well as making it easier to share photos with others. The PhotoCD is included with this package, so you'll have no worries about that, either. Cast Members at Disney's PhotoPass are so happy to help, too, I'm sure that you'll be thrilled with your purchase.
"Photos from other Disney experiences" may include photo ops which did not take place at attractions or character meals. For example, my daughter and I added photos from an 'Ohana PhotoPass opportunity while we were dining at the nearby Kona Cafe at Disney's Polynesian Resort. Many other photo opportunities may include other activities such as special ticketed events, water park photos and more, many of which are a little different than a typical PhotoPass photo.
For more information, head over to the unofficial site AllEars.Net, and enter "photo pass plus" into the search bar. There, you'll find lots of information about this great program. In addition, don't miss the opportunity to take advantage of the
PhotoPass+ pre-order discount which makes this an even better deal.
Have fun planning, Ryan, and be sure to send more questions as you think of them. I love to help!