HDM, is a strange bird and less immediately useful than you'd think despite it's greater capability than Apple's Disk Utility. RAID support seems very thin, the incremental backups are not compatible with anything Apple (proprietary Paragon format!). What is there in HDM are file integrity checks (something like Disk First Aid and the now missing Fix Permissions routine). Had Apple not crippled Disk Utility to the point of making it useless in El Capitan/Sierra/High Sierra I'd stick with Disk Utility. HDM is an awkward but powerful attempt at a replacement. For the moment, expert users only though. Just configuring the interface to be readable is half an hour's work for a CSS designer. Why HDM has to be so ugly is a mystery to me. One attractive theme with small/medium/large typeface sizes (not all elements should be the same size of course, but they should be resized proportionally depending on your choice) would be much better than three themes with nearly infinite (but still inadequate: with larger typeface some columns remain too narrow to read all the info) customisation options.
Paragon NTFS kext is set and forget. This monster HDM is anything but. For backups I continue to prefer SuperDuper! (working in High Sierra!) which uses native Apple formats. Native backup formats give me great confidence I'll be able to access my backups in the future (Apple disk images). Who knows what the future will bring with HDM? Why Paragon had to create its own backup format is another mystery for me. Much too much world invented here syndrome in HDM.
The licensing system is a complete nightmare. I have 15 Paragon licenses for various products and I dread deploying a new license. The licensing is now only very painful (think dentist) rather than excruciating (think dungeon, medieval torture). Or maybe I'm just more expert in it. Pricing is fair, bundles are often available so big marks for selling at reasonable prices. With reasonable prices, these kind of copy protection mechanisms aren't really needed, especially for mission critical applications like disk utilities (do users really want to risk their data to an outdated or pirated disk utility, probably not).
2.5 stars for taking on a challenging task and at the very least not erasing all our data. If you check other disk utilities out there for Apple, only the very innocuous SuperDuper! (doesn't modify originals) and DiskWarrior don't have dozens of angry users waving pitchforks over lost data. I own both of those (and most of the others). Only those two get regular use, along with the benchmarking from Disk Speed Tools (the tool I use isn't a disk utility really but it's part of a suite one could use as a disk utility). Hopefully HDM will get better. v1.2.2 is already somewhat more usable and more powerful than 1.1.
Suggestion: copying the design of Apple Disk Utility circa Snow Leopard would be a much better start than this QT home rolled Slackware style look. Throw out the current UI and start over.