My family of four visited Cambodia over Christmas holiday, 2012. Our guide was Ta, who I believe works with Peace of Angkor tours. We were staying in Siem Reap, so the trip out to Khampong Khleang was about an hour. We found the day trip very educational and enlightening. As an example, on the way to the town, we stopped to learn how villagers made sticky rice packages using bamboo to sell as snacks for others and on the way back we stopped by a nearby "bakery" that made wafer cookies (kind of like the consistency of fortune cookies) out of something similar to an outdoor garage for what appeared to be a wholesale market. It probably doesn't sound appetizing, but it looked clean and tasted good.
At the town itself, we took a boat ride to the lake and then turned around, visiting fish traders along the way. The ride was enjoyable and interesting. We didn't see any boat traffic except for others carting fish. In town, we walked by the school, hospital and village, and had lunch inside one of the villager's home. The lunch was tasty and clean (fish, vegetables and fruit) but most significant for me was an opportunity for my family to get an opportunity to get a glimpse into village life. It wasn't a home stay and our hosts had probably more means than most (they had a generator and a water tank) but it was a digestible way for us to experience something we would not normally see.
I've read the reviews of others and would agree that if I experienced the same, I would reach the same conclusions, but our experience was different. Perhaps it was the tour guide that made the difference, I don't know. All I can say is that it was one of the more memorable experiences we had. So much so that, five months later, a photo of a Khampong Khleang "street" scene is the home photo on my phone.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.