Has anyone heard why the original hard shell backpack was discontinued? I have a chance to buy one, but I wanted to check before going ahead. I really like the design from the pictures. Can owners that received these initial backpacks make some postings of how they are holding up? I had heard that maybe the front logo had a tendency to come off. Is this true? I had also heard that it just wasn't holding up due to poor design. I would really like to here how current owner's hard shell backpacks are doing after sustained usage. Thanks!