Pai is a small place as far as entertainment goes, and there's only so many places all the tourists will end up at. No surprise to us that lot of them found their way here. Kind've difficult to take pictures with people everywhere.
The waterfall is on three levels. The first one is easily accessibly, right next to the parking area. If you walk further up (not a difficult walk at all) then you can see the rest of the waterfall whilst standing on a bridge. In order to see the waterfall in full you kind've have to go up one more level. It's not difficult in terms of fitness to get up there, but its hard in that the path is not fully sealed and it's pretty much like climbing rocks. The thing that makes it more difficult is that some people just stand in the middle of the path blocking the already narrow/slipper/rocky path!
My husband and I climbed further up, almost on top of the waterfall (there's a small unsealed path to the right). This is slightly challenging in that if it rains don't go as it could get very slippery. There's no clear view of flowing waterfalls up there, but there is a small pool made from the falls. We didn't swim but it was nice to get away from the crowd for a short 'trek'.
A lot of people were swimming in the waterfalls, so take your swimmers along if you are keen