The Happy Guesthouse is clean, comfortable, and does a great job of taking care of all of your needs while you are in Siem Reap. The Guesthouse has tuk tuks available for tours of Angkor Wat for reasonable rates, and has a fully stocked kitchen. If booking through Expedia be sure to contact the Guesthouse directly to get an A/C and hot water room, as rooms are available with and without, and Expedia does not make this clear. The food is fairly reasonably priced, and not bad at all (I particularly liked the steamed dumplings, the breakfast, and the milkshakes).