Macrium uses Windows shadow copy as part of it's mechanism - at least the previous release did.
Neither good nor bad unless your shadow copy system gets corrupted like mine did.
This happened over a year ago - my main laptop was dying and I wanted to backup my data before getting its replacement. I had just recently switched to Macrium and had used it without issue on several of my family's PCs (had a multiple user license).
But when I went to back up my laptop I could not get Macrium to work because my Windows Shadow Copy was disabled and could
not be enabled. I ended up reinstalling Acronis and had no problem backing it up.
While I use Acronis as my main back system I am not a big fan boy.
I think they put more effort into marketing than in optimizing their software.
I've learned to alternate backups so that I always have more than one recent full back up. I've had verified as good backups turn out to be corrupt when I needed to use them.
For me doing a full restore can be a pain require both a bootable USB and external USB harddrive.
I don't plan on upgrading to the latest Acronis version, it has nothing new that interests me.
<sigh> reminds me that I need to do a full backup this weekend...