Sites such as Priceline, Expedia, and other aggregators can point travelers to excellent deals, largely because they buy rooms in bulk at a discount and sell them for cheap. That said, booking a room through one of these sites may not be the ticket to the most desirable accommodations. For one, sometimes the reservation is lost; there are woeful tales online of travelers arriving only to find the hotel is full and their names are not in the system. Then too, in posts on Reddit several hotel employees admit that the cheapest rooms (near a stairwell or elevator, say) are often referred to as "Expedia rooms." (Others insist they treat all customers the same, and anyway, rooms are picked by their electronic booking systems, not by people.) And finally, booking through an aggregator inserts a go-between unlikely to be flexible about prices.