Overall, I think that the photos on the website are not showing reality; I was expecting it to be much nicer than it actually was. The swimming pool isn't really a pool, it's a tiled hole in the ground; what I mean is that the water is stagnant and dirty, so we never used it. Actually, I only saw one person going in that water once over 4 days. Also, there is not even enough space to stay around the pool, there are only two sunbeds on the only side where there is a little space to relax.
The first room we got was quite crappy and full of mosquitoes, so we asked if there was another one, which we got and was much better. Rooms upstairs have more light.
There are only a few plugs in the room, so we had to decide if we wanted to charge a phone and camera or use the TV. Could do with an extension, maybe.
One day the water pressure was too low in the morning, so we didn't have water in our bathroom.
Another day the electricity was cut in town, so be prepared that you could have to stay without power (and coffee, and anything that requires electricity to be made) for hours. That's not directly the guesthouse's responsibility, and it's apparently common in Cambodia.
We also were unlucky that there was a funeral right next to the guesthouse, at which they played incredibly loud music for two days, only interrupting the music for 4-5 hours at night. The staff tried to get them to play it less loud, but with no results. It was quite annoying not being able to sleep when you need to wake up early to visit the temples. For these inconveniences, the owners gave us a discount, fortunately.
The guesthouse is in a good location, it's easy to walk to most places in town.
They came to fetch us at the airport and welcomed us with a drink, giving us a map and sharing a few basic information on Siem Reap. They helped us arrange a tuktuk for visiting the temples, the driver stayed with us for three days and was nice, but his English was very limited. This wasn't a big problem, but we did not get any of those nice tips that would make your visit more interesting.
It's nice to stay with locals, but it would be even nicer if they'd give some tips about where to eat, what to do or what to buy. Btw, go eat at the market, Rina Rino is a good and cheap restaurant!