OK, there's little reason to bother when Macrium Reflect Free is available, but it is a decent app if you don't like Macrium, or as a sort of spare alternative. I keep a copy in a 32-bit & 64-bit VM in case Macrium ever stops working, or has a bug that hasn't been fixed yet etc. And Backupper has the portable version, designed for WinPE, in a folder inside the program's folder. It does need to be registered separately or individually, and could come in handy someday, which is another reason I keep a copy in the VMs.
Installation-wise it's not bad, with less impact than Macrium or Paragon & way less than Acronis. My only fault with Backupper is that when I switched to Macrium a half dozen years or so ago AOMEI's bootable USB sticks wouldn't work on every one of our devices. That may have been fixed by now, &/or adding the portable version to a WinPE USB stick probably makes that issue moot, but using Macrium I haven't had cause to go through the hassle of trying to boot every single device from an AOMEI USB stick.