The difference between HDR and Still (Flash) images can be quite striking.
HDR is recommended for larger homes or even smaller homes that are furnished.
In a larger home a single flash will only light the immediate surrounding areas. Rooms in the distance are often dark as a result. Direct straight on flash also creates a "flat" looking image. In contrast HDR brings out a lot more detail and rooms in the distance will be well lit.
Examine the two images below to get an idea of the differences.