see, there's it's a character meal so you have to consider the characters and the meals.
for the food.. it's not as great a selection as say crystal palace or park fare. i wasn't that crazy about the quality either, but i suppose that comes and goes. but there are meals with less of a selection (ohana probably had the slimmest selection, but the food was really good and it came to you).
for characters... first, for the donald lovers, this isn't the only character meal donald shows up at, he's also at chef mickey's. there's nothing particularly special about the selection of characters here (for example, CP is usually the only place you'll find piglet and lilo can sometimes be a challenge to find outside of best friends and ariel only has legs at princess storybook, etc), other than they are in different outfits, as is the case for all character meals (for fab 5 anyway)
the layout of the restaurant is tough. it's sectioned off completely and they seat section by section. there's a perk however in that you're almost guaranteed character interaction because they give you ample time to get food before the characters are marched in, something that's not guaranteed anywhere else outside of ohana (because it's family style). but they do tend to march the characters through giving enough time for a photo and a signature. it's not the best character interaction for meals.
some people also like the perk of being in the park before it opens. this is a clear advantage at MK for example where you have all of main street up to the castle to roam and take pictures. the problem with DAK is a lot of the time of the year, the park closes while it's still light out, so if you just wait 10 minutes after park closing, you can take plenty of shots without crowds in them. so this is not a reason i see for doing this breakfast.
so to summarize, it is my least favorite meal of the bunch, but as i've said before, it does seem to appeal to those that either (1) have this as their first character meal ever and (2) have later seatings.
i will tell you from doing many character meals at the latest seating is that it's very hard not to have good character interaction. the restaurant doesn't kick you out, the characters don't go away and as the tables dwindle, the less restrictions they have.