If you want a value stay in LP, try this. There are no frills and little space if you want to spend 1/2 a day in the hotel but it has all you need. It is clean, comfortable and the staff are very friendly and helpful. Breakfast is across the road along the Mekong. It is simple but adequate and the BBQ toast is great! Location is great for all in the town, market, bars and eating places.
Street rooms at least have a small balcony where you sit and watch the world go by in sleepy but great Luang Prabang.