First, since you are at a point where you are torn between taking and leaving an item with you, what you list down might not be final. However, the beauty of the inventory is that by looking through it at least more than twice, you will be able to assess your priorities. If you have had numerous boxes up in the attic that was of no use, then most likely they will meet the same fate in your new home. Thus, there is no point in taking them and adding to the bulk of packed goods. What’s best is for you to give them away, donate them to charity or sell them on a garage sale.
Second, there might be instances when some minor or major mishaps might happen along the way. For example, when on transit, some of the goods might have been forgotten or purposefully left behind for a scamming to commence. Undeniably, there are companies that will take advantage of situations like these. Also, damages may be done to some items due to carelessness, and of course someone should be liable. Thus, the inventory will serve as the proof that indeed, the item(s) in question are/were in fact handled by the company.
Third, when a representative of the company is at your home surveying the number of things you have and their kinds, he/she will know exactly what needs to be done by estimate. For example, if you have furniture that is of high value and are enormous in size like a piano, it would take at least 3 workers to pack and carry it to the truck. The same goes with other furniture and appliances that need extra care and additional hands when being taken care of. Overall, the size of the workload will be estimated at the most accurate, thus the company can appoint the right number of staff and you will also know the corresponding rate for the service you are availing for.
Fourth, when finally you are in your new home, seeing all the boxes scattered on the floor or piled up will be stressful enough. It is best to be able to stack and store them in their respective rooms with the help of the labels in each container. This way, when the unpacking will commence, you won’t have to drag boxes upstairs, downstairs, outside or to another room. For example, a box labeled utensils would definitely belong to the kitchen, chinaware and appliances like a microwave oven and toaster. Since unpacking room by room is advisable, then you should go ahead and let the “unloaders” put the boxes in their respective places.