Thorough gentleman! If you want to explore and understand about reservoirs and also orchids and the floral market culture in Singapore, this experience is for you. Paul is very knowledgeable and makes things interesting and explains very well. It felt like taking a stroll with a friend. The hike is fun. It was a little sunny so carry a cap or an umbrella.
If you want to understand the real Singapore and their unique community style of living please take the Heartland tour by Paul, highly highly recommended :)