You would notice that majority of the shipping entities charge volumetric weight when it comes to bulky items. This means, if the item is a hollowed out unit (eg: guitar case), the shipping charges would be based on the weight of the item if it was full-volumed. That's daylight robbery.
Borderlinx had taken a bold step in waiving this consideration for smaller items up to the limit stated above. It may not be an extensive victory on the part of buyers but it means cost savings & the fact that you are dealing with honest transactions.