This trip is absolutely worth it. Our tour was private, so it was just the two of us being driven around in a well-air conditioned car. The waterfalls are stunning. You can choose to go and see all 7 of them (walking up hill in high humidity can be quite a challenge to see the last few ones, and the path can be quite slipper - wear good water shoes), but don't worry if you don't fancy that - the first few waterfalls are all equally beautiful and not very challenging at all to get to. The water is nice and cool, a welcome refreshment from the heat/humidity with lots of fish swimming about. Some waterfalls you can slide down to the lake below. There are toilets around to get changed, some minor souvenir shops. Kwai Bridge, Buddha cave and railway ride also great. Our lunch was traditional Thai food (soup, sweet and sour chicken and some fruit). Last but not least he guide and the driver were great - well-informed and polite. Highest quality experience.