We are recently back from Sapphire Falls, and really enjoyed our stay there!
We actually did a bit of a split. We did two nights at SF, one at RP, and two more at SF.
Our first room was pool view in tower #2. It was on the same floor as the lobby, and was a short walk down a window filled hallway. It was close to the lobby and pool.
The second room was falls view in tower #3. Initially we were assigned the furthest room in tower#2, so we asked to be moved. We were told that as of right now, only tower #2 and #3 are open. Our tower #3 room was close to the convention wing, and the shuttle boat.
Both views were nice. We had the full tub in both rooms. With pool view, we were able to see when a storm closed the pool. With falls view, we could partially see the top of Hulk, etc.
I imagine that eventually these two towers might eventually be given a designation of 'preferred location', because the additional towers will be further away from the lobby. We saw what looked like quit a bit of additional convention/business meeting space in the construction area (towards RP).
The transportation boats were very frequent. US is doing a great job keeping them coming. When the rest of the resort opens, I predict they will become more crowded. We also walked a few times and it was only a little further than RP, so quite close. The walk to RP is also very short, so dining at either is an easy option from either hotel.
The pool is really pretty, with a very nice, smooth water slide.
Overall, the staff was VERY nice.
The Dutch Trading Company food was very good. The tomato soup and hot bar options were delicious. For just $8 the give you a good sized portion of any a la carte hot entrée (full meal was more like $15). The plantains were also quite good. the service is very good, but I imagine this also could become more crowded as the resort expands.
We supplemented our breakfast foods with a quick run to nearby Whole Foods, which is less than 10minutes away. WF has a very large selection of hot/cold bar prepared foods and ample dining tables. They have everything from shrimp/sushi to BBQ and soups.
We also tried nachos at the pool, and late night snacks at bar. The nachos were very good, if the bottom layer was rather greasy. The portion was very generous though, so we just left the bottom layer of chips. The ceviche and arepa were tasty, but they aren't kidding when they say 'tapas' sized portions. The service was tad slow, but otherwise we enjoyed it.
The only other issue we encountered is that our first room wasn't cleaned. We were out of the room almost all day - 8:30am until 9pm, except a little break from 4-5:30pm. When I mentioned at check out that our room was never cleaned, they told me it was because our room was occupied! Our second room was serviced at 5:40pm, so very late in the day. (Our WDW room was serviced before 2pm every day.)