AAARRRGGGHHH...someone else knows my "secret". I have always booked these obstructed view cabins on HAL since my first travel agent told me about them. They are wonderful !!! You get all the advantages of outside for an inside price. The biggest selling point for us was that the bathrooms are larger since they include the tub. Doesn't give you that feeling that you are showering in a phone booth.
And as everyone wlse has already said, during the day you cannot see into these cabins, but keep the drapes closed at night. You will have a fantastic time no matter what when you sail on HAL.