Some of the negative comments here nearly made me cancel my three day stay at the CR last week and head over to the Poly but, as the Poly does not have king beds and I didn't want an extra bed taking up space, plus I wanted the romantic view of the castle, I stuck with the CR. I was glad I did! I thought the resort looked great and I was not at all put off by the "wild" colors in the room. The bed sheets were bright, but the room was big, relatively subdued, and with the cold and rain on Wednesday, the interior monorail saved a bit of discomfort. Had we been at the Poly, we would have to have raced in the rain to get the to monorail though, I admit, in the overal scheme of things, an extra few hundred yards of walking outside would not have made that much difference to how wet we ended up!
I did walk around the Poly grounds and they were nice and certainly more romantic for taking walks with your SO, so you have to decide which experience you want.