I think you can see them somewhat ok from the Windsor Hills condos that are higher up. You can hear them from our townhome there, but that's about it. I think the whole "fireworks view" amenity is overrated personally, I agree with the other posters that they aren't really all that great from a distance like this, to really see them well you need to be there in person, up close, with the music and all.
We were at California Grill atop the Contemporary last trip, and the MK fireworks "Wishes" are great from up there, for instance, because they dim the lights and pipe in the music. Then we saw the Epcot ones going off...big disappointment, it's just not nearly the same atmosphere if you're not there, and we had a much better view and vantage point than you probably would from most pool homes.
Focus on finding an awesome home with great amenities and go see the fireworks up close is our recommendation!