So what's the payoff for all this work?

Well, the Lower Kalimna Falls was the first waterfall I reached on the walk and it falls roughly 5m. However, what it lacks in height it more than makes up for by its character. By this I mean that not only is the waterfall attractive and somewhat unusual in a forested setting, but I was able to walk behind the waterfall as well. Plus, it was very quiet and serene here and it was quite easy to lose myself and just chill for longer than I did (I couldn't chill for too long since Julie was waiting at the car).

The Upper Kalimna Falls was the second and last waterfall on the long walk and it was roughtly 20-25m tall. I was looking against the sun during my visit so the photograph shown below wasn't great. I guess in hindsight, I could've come here much earlier before the sun rose above the west-facing cliff or come later in the arvo when the sun would've been been behind me.

In any case, despite its height, I'd argue that the Lower Falls was the more scenic of the two.