My partner and I did a tour around Battambang, guided by Rita. Rita was friendly and very knowledgeable, and we saw a number of things including temples, the bamboo train, and the bat cave at Phnom Sampov. We also visited various local food producers and tried their produce (including dried banana, fresh spring rolls, sticky rice, and palm wine, all included in the price).
Overall, it was a fantastic, memorable day.
Bun continued to be hugely helpful even after our tour: I got in touch after we left Cambodia to let him know we had lost a phone in Battambang, and Bun went ahead and made enquiries on our behalf at a number of places!