This is a very cool photo. It actually deserves a 6.
It only might be because the bag is hanging middle of a regular room. If that would have for white walls, or mirrored walls, other than a regular room, could get more points. But it still is an excellent photo for my taste :)
Nice black and white conversion, as for the composition maybe you should have included the whole fireplace and less of the ceiling. I don't like the framing though.
This is one instance where I don't think the single line within the picture border works - well, it works on the top and sides, but I thought it was a cord across the floor at first. I do like the concept and hope you didn't hang that thing just for the challenge!
Good idea and the parameters (empty room and one item) are certainly met. Normally I don't comment on borders at all, but I find this one distracting as it made me look at it (the lower left corner feels odd). Most of the time borders aren't really noticed much. I wish you had lowered the blinds on all windows. For some reason they take interest away from the piece of gym equipment.
This has really good halftones. I'm not a fan of gratuitous B$W so for me to like the mono treatment means you've chosen well and done the right thing. Borders are a win/lose thing on DPC and this time I think it's a lose