If they are going to like the water play area better than a waterslide, I would go for the RPR. It they are going to like the water slide, than go with HRH. My kids 4 and 2 loved it. My now 5 year old says that is where he wants to go for our next vacation. Hard Rock was very cool for mom and dad and they loved the pool. We stayed at Portofino one time and that did not stick out in their head. It seemed like a lot of walking to get to your room there. Plus, we had a stroller and there were a lot of stairs, so we had to keep going out of our way for the ramps. We just strolled around RP and it was a pretty atmosphere, but we have to go for the waterslide. By the way, you can stay at one hotel and use the pools at all three.