I assume you're referring to Disney Fine Art Photography. They have 2 main options 1. Mini Session which is $191.70 with tax - it's a 20 minute session with a professional photographer and assistant at a resort location of your choice. You get all the images (to print on your own) on a flash drive. The resolution is good up to an 8x10. Option 2 - Enhance session is $399 - it's a one hour session with a professional photographer and assistant at a resort of park (except MK). The images are lightly corrected as needed, some enhancements are added ie. black and white. You receive the images on a CD in a few weeks and the resolution is up to 30 x 40. There is a mini session at MK on some dates for $195 for 15 minutes but it's not always available.
You don't receive any prints but you can have them printed anywhere yourself.
We did the enhanced photo session twice at Epcot for my daughter's senior photos and family pictures. We were very pleased with them. Let me know if you have any specific questions, I'd be happy to help. Epcot is nice because you can go to the countries prior to park opening, so no strangers in your photos plus you get fabulous backgrounds.