I don't doubt Win 7 imager works as designed. But the design seems not suited to most people I've seen here, who simply want a full image so they can restore when they encounter a software or hardware problem.
The Win 7 imager has too many "gotchas" for casual PC users who don't care about scheduling and incrementals. They don't want to deal with space management, USB 2.0 vs USB 3.0, renaming full backup files, attaching VHD's, etc, etc.
They just want their computers restored NOW after something breaks.
I'm not a "casual" PC user, and found unexpected "issues" with Win 7 imaging when I tested it. Specifcally, I copied the image folder to a second drive, then ran the the recovery disk. It found only the latest image in the copied image folder.
The original showed all incremental versions. Of course there's a reason for this.
But do I want to find the reason? No. I don't need incrementals.
I just want a discrete image file that can easily be found anywhere I put it, and be restored.
So I kept using Ghost 15, which does exactly that. So does free Macrium, except I believe it has 2 files.
I don't doubt any software doing incrementals has its own "gotchas."
If somebody wants to do incrementals, I would recommend the Win 7 imager, but caution them they should learn it thoroughly, as with any incremental imager.
That's basically my KISS view, and I'm not alone there.
Anything that complicates successful imaging/restore should be avoided. That includes the system reserved abomination.
Still willing to have my mind changed though.