I'm debating the same thing. Some things that my friends have told me to consider are: 1) What if we go to a park and it's really really busy? If we have park hopper, we can leave and go to a less crowded park. 2) What if we have PS at a restaurant in MK for a certain day, but it's cold or rainy that day. If we could park hop, we could go over to Epcot where more things are inside and we could get out of the rain. 3) What if we find we are done with a park after just a few hours and want to go back to our favorite park? Without park hopper, we couldn't do it. My friends all tell me park hopper is worth it, but I have a hard time justifying the extra $175 it will cost for the 5 of us. However, given the total cost of the trip, $175 is just a drop in the bucket.