I stayed at the Goldiana Angkor Hotel when I was in Siem Reap largely because the guest houses that had been recommended to me were all booked up during my short side trip there and because I was staying at the Goldiana in Phnom Penh and so it was easy to book both together. I would rate the GAH as "just fine." The property was very clean, the staff friendly and helpful, my room was large and comfortable, and the breakfast buffet was vast (although largely catering to the Japanese and Korean breakfast preferences). For the price paid it was a good value. The location isn't great, it isn't bad...just along the main road from the airport into the town. It's not easy walking distance to the restaurant/bar district, but all one has to do is walk out to the main road and half a dozen Moto drivers descend to offer you a lift. I spent almost no time in the hotel anyway, since one does not go to Siem Reap to be in a hotel.
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