We stayed at the Angkor Saphir Hotel in Siam Riap. The best thing about this hotel is the price ($35 US/night). The hotel itself, lobby, and rooms are very nondescript (ok, ugly), but it is clean, and it has a good location, private baths and air conditioning. It is located near the Grand Hotel d’Angkor on the edge of town, in walking distance to several shops and restaurants.
This hotel is a passable choice if you don''t have time to research others, or are looking for a no-fuss, no-frills hotel that is safe and clean. If you do have time to research, however, there are other hotels in this price range that at least appear to have put more effort into the decor (like the Angkor Diamond Hotel).