We stayed at Savannah view at Kidani last year and loved every second of it. We haven't stayed in Jambo for comparison but we loved that Kidani was a bit quieter. The lobby in Jambo is stunning, but Kidani's is just as amazing, albeit smaller. Sanna does a quick service breakfast and you are able to refill your mugs from the gift shop so if you are in a pinch there is food and drink.
The shuttle that runs between the two is really quick and is always either waiting outside the resort when you need it or no more than 5 minutes off. We spent a day at both pools and personally liked Kidani much better. At the Jambo pool you had to keep going in and out of the gates to get to different areas which I just find odd.
I would say the downside of Kidani is that he hallways are LONG. The good part though is that there is Savanna viewing in between the blocks of room so you can stop and enjoy the view on your way to and from your room. If you don't want to walk try and request a room close to the elevators. Not gonna lie, at the end of the night it feels like you will never get back to your room!