This is a fabulous box, but just be warned that if you intend to store your artwork with the CDs, you will NOT get 656 CDs in the box! I think you can get maybe 450-500 maximum with the inlays etc.
The box itself is brilliant, strong, sturdy, airtight. The hanger's are a little cheap unfortunately, which lowers the overall quality of the storage, but otherwise, it suits the job at a reasonable price :).
Just make allowances for the inlays as well... I'll be needing a bigger one to store the rest of my CDs!