We traveled to the Falls by motorbike from Luang Prabang. An easy 30 klm ride.
The falls were OK. There are a few pools there and the water is clear and had it been warmer we would have swam. Perhaps aim to arrive late morning at latest. We experienced quite a few tourist groups.
Maybe take some lunch also, there are a number of benches to sit at - just make sure you beat the tour operators who set them up for their groups.
The Bear rescue centre was interesting.
Take a towel and a change of clothes, change rooms are provided.